Multiplying the common ordinary fractions: 117/70 × 58/120 = ? The multiplication process explained. The result written: As a positive proper fraction (the numerator < the denominator). As a decimal number. As a percentage
117/70 × 58/120 = ?
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.
117/70 is already reduced to the lowest terms.
The numerator and denominator have no common prime factors.
Their prime factorization:
117 = 32 × 13
70 = 2 × 5 × 7
58/120 =
(2 × 29)/(23 × 3 × 5) =
((2 × 29) ÷ 2)/((23 × 3 × 5) ÷ 2) =
(2 ÷ 2 × 29)/(23 ÷ 2 × 3 × 5) =
(1 × 29)/(2(3 - 1) × 3 × 5) =
(1 × 29)/(22 × 3 × 5) =
29/60
Rewrite the equivalent simplified operation:
117/70 × 58/120 =
117/70 × 29/60
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.
117/70 × 29/60 =
(117 × 29) / (70 × 60) =
(32 × 13 × 29) / (2 × 5 × 7 × 22 × 3 × 5) =
(32 × 13 × 29) / (23 × 3 × 52 × 7)
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 × 13 × 29; 23 × 3 × 52 × 7) = 3
Divide the numerator and the denominator by their GCF:
(32 × 13 × 29) / (23 × 3 × 52 × 7) =
((32 × 13 × 29) ÷ 3) / ((23 × 3 × 52 × 7) ÷ 3) =
(32 ÷ 3 × 13 × 29)/(23 × 3 ÷ 3 × 52 × 7) =
(3(2 - 1) × 13 × 29)/(23 × 1 × 52 × 7) =
(31 × 13 × 29)/(23 × 1 × 52 × 7) =
(3 × 13 × 29)/(23 × 1 × 52 × 7) =
(3 × 13 × 29)/(23 × 52 × 7) =
(3 × 13 × 29)/(8 × 25 × 7) =
1,131/1,400
Rewrite the fraction
As a decimal number:
Simply divide the numerator by the denominator, without a remainder, as shown below:
1,131/1,400 =
1,131 ÷ 1,400 ≈
0.807857142857 ≈
0.81
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.
0.807857142857 =
0.807857142857 × 100/100 =
(0.807857142857 × 100)/100 =
80.785714285714/100 ≈
80.785714285714% ≈
80.79%
The final answer:
written in three ways
As a positive proper fraction:
(the numerator < the denominator)
117/70 × 58/120 = 1,131/1,400
As a decimal number:
117/70 × 58/120 ≈ 0.81
As a percentage:
117/70 × 58/120 ≈ 80.79%
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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