Multiplying the common ordinary fractions: 25/16 × 4/49 = ? The multiplication process explained. The result written: As a positive proper fraction (the numerator < the denominator). As a decimal number. As a percentage
25/16 × 4/49 = ?
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.
25/16 is already reduced to the lowest terms.
The numerator and denominator have no common prime factors.
Their prime factorization:
25 = 52
16 = 24
4/49 is already reduced to the lowest terms.
The numerator and denominator have no common prime factors.
Their prime factorization:
4 = 22
49 = 72
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.
25/16 × 4/49 =
(25 × 4) / (16 × 49) =
(52 × 22) / (24 × 72) =
(22 × 52) / (24 × 72)
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 (22 × 52; 24 × 72) = 22
Divide the numerator and the denominator by their GCF:
(22 × 52) / (24 × 72) =
((22 × 52) ÷ 22) / ((24 × 72) ÷ 22) =
(22 ÷ 22 × 52)/(24 ÷ 22 × 72) =
(2(2 - 2) × 52)/(2(4 - 2) × 72) =
(20 × 52)/(22 × 72) =
(1 × 52)/(22 × 72) =
52/(22 × 72) =
25/(4 × 49) =
25/196
Rewrite the fraction
As a decimal number:
Simply divide the numerator by the denominator, without a remainder, as shown below:
25/196 =
25 ÷ 196 ≈
0.127551020408 ≈
0.13
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.
0.127551020408 =
0.127551020408 × 100/100 =
(0.127551020408 × 100)/100 =
12.755102040816/100 ≈
12.755102040816% ≈
12.76%
The final answer:
written in three ways
As a positive proper fraction:
(the numerator < the denominator)
25/16 × 4/49 = 25/196
As a decimal number:
25/16 × 4/49 ≈ 0.13
As a percentage:
25/16 × 4/49 ≈ 12.76%
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.
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