Multiplying the common ordinary fractions: 9/4 × - 25/144 = ? The multiplication process explained. The result written: As a negative proper fraction (the numerator < the denominator). As a decimal number. As a percentage
9/4 × - 25/144 = ?
Simplify the operation
Rewrite the equivalent simplified operation:
Combine the signs of the fractions into a single one, placed in front of the expression. If the sign is + then it is usually not written.
The sign of a multiplication operation:
+ 1 × + 1 = + 1
+ 1 × - 1 = - 1
- 1 × - 1 = + 1
9/4 × - 25/144 =
- 9/4 × 25/144
Simplify the operation
Reduce (simplify) the fractions to their lowest terms equivalents:
To fully reduce a fraction, to the lowest terms equivalent: divide the numerator and denominator by their greatest common factor, GCF.
* By reducing the values of the numerators and the denominators of the fractions the calculations are easier to make.
A fully reduced (simplified) fraction is one with the smallest possible numerator and denominator, one that can no longer be reduced, and it is called an irreducible fraction.
* In order to easily reduce a fraction, factor its numerator and denominator. This way all the common prime factors are easily identified and crossed out, without calculating the GCF.
9/4 is already reduced to the lowest terms.
The numerator and denominator have no common prime factors.
Their prime factorization:
9 = 32
4 = 22
25/144 is already reduced to the lowest terms.
The numerator and denominator have no common prime factors.
Their prime factorization:
25 = 52
144 = 24 × 32
Perform the operation of calculating the fractions
Multiply the fractions:
1) Multiply the numerators, that is, all the numbers above the fractions bars, separately.
2) Multiply the denominators, that is, all the numbers below the fractions bars, separately.
* Factor all the numerators and all the denominators in order to easily reduce (simplify) the end fraction.
- 9/4 × 25/144 =
- (9 × 25) / (4 × 144) =
- (32 × 52) / (22 × 24 × 32) =
- (32 × 52) / (26 × 32)
Fully reduce (simplify) the end fraction to its lowest terms equivalent:
Calculate the greatest common factor, GCF,
of the numerator and denominator of the fraction:
A fully reduced (simplified) fraction is one with the smallest possible numerator and denominator, one that can no longer be reduced, and it is called an irreducible fraction.
To fully reduce a fraction, to the lowest terms equivalent: divide the numerator and denominator by their greatest common factor, GCF.
* To calculate the GCF, we need to factor the numerator and the denominator of the fraction into prime factors.
Then multiply all the common prime factors: if there are repeating prime factors we only take them once, and only the ones having the lowest exponent (the lowest powers).
GCF (32 × 52; 26 × 32) = 32
Divide the numerator and the denominator by their GCF:
- (32 × 52) / (26 × 32) =
- ((32 × 52) ÷ 32) / ((26 × 32) ÷ 32) =
- (32 ÷ 32 × 52)/(26 × 32 ÷ 32) =
- (3(2 - 2) × 52)/(26 × 3(2 - 2)) =
- (30 × 52)/(26 × 30) =
- (1 × 52)/(26 × 1) =
- 52/26 =
- 25/64
Rewrite the fraction
As a decimal number:
Simply divide the numerator by the denominator, without a remainder, as shown below:
- 25/64 =
- 25 ÷ 64 =
- 0.390625 ≈
- 0.39
As a percentage:
A percentage value p% is equal to the fraction: p/100, for any decimal number p. So, we need to change the form of the number calculated above, to show a denominator of 100.
To do that, multiply the number by the fraction 100/100.
The value of the fraction 100/100 = 1, so by multiplying the number by this fraction the result is not changing, only the form.
- 0.390625 =
- 0.390625 × 100/100 =
( - 0.390625 × 100)/100 =
- 39.0625/100 =
- 39.0625% ≈
- 39.06%
The final answer:
written in three ways
As a negative proper fraction:
(the numerator < the denominator)
9/4 × - 25/144 = - 25/64
As a decimal number:
9/4 × - 25/144 ≈ - 0.39
As a percentage:
9/4 × - 25/144 ≈ - 39.06%
How are the numbers being written on our website: comma ',' is used as a thousands separator; point '.' used as a decimal separator; numbers rounded off to max. 12 decimals (if the case). The set of the used symbols on our website: '/' the fraction bar; ÷ dividing; × multiplying; + plus (adding); - minus (subtracting); = equal; ≈ approximately equal.
Other similar operations
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