Multiplying the common ordinary fractions: 39/77 × 50/72 = ? The multiplication process explained. The result written: As a positive proper fraction (the numerator < the denominator). As a decimal number. As a percentage
39/77 × 50/72 = ?
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.
39/77 is already reduced to the lowest terms.
The numerator and denominator have no common prime factors.
Their prime factorization:
39 = 3 × 13
77 = 7 × 11
50/72 =
(2 × 52)/(23 × 32) =
((2 × 52) ÷ 2)/((23 × 32) ÷ 2) =
(2 ÷ 2 × 52)/(23 ÷ 2 × 32) =
(1 × 52)/(2(3 - 1) × 32) =
(1 × 52)/(22 × 32) =
25/36
Rewrite the equivalent simplified operation:
39/77 × 50/72 =
39/77 × 25/36
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.
39/77 × 25/36 =
(39 × 25) / (77 × 36) =
(3 × 13 × 52) / (7 × 11 × 22 × 32) =
(3 × 52 × 13) / (22 × 32 × 7 × 11)
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 (3 × 52 × 13; 22 × 32 × 7 × 11) = 3
Divide the numerator and the denominator by their GCF:
(3 × 52 × 13) / (22 × 32 × 7 × 11) =
((3 × 52 × 13) ÷ 3) / ((22 × 32 × 7 × 11) ÷ 3) =
(3 ÷ 3 × 52 × 13)/(22 × 32 ÷ 3 × 7 × 11) =
(1 × 52 × 13)/(22 × 3(2 - 1) × 7 × 11) =
(1 × 52 × 13)/(22 × 31 × 7 × 11) =
(1 × 52 × 13)/(22 × 3 × 7 × 11) =
(52 × 13)/(22 × 3 × 7 × 11) =
(25 × 13)/(4 × 3 × 7 × 11) =
325/924
Rewrite the fraction
As a decimal number:
Simply divide the numerator by the denominator, without a remainder, as shown below:
325/924 =
325 ÷ 924 ≈
0.351731601732 ≈
0.35
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.
0.351731601732 =
0.351731601732 × 100/100 =
(0.351731601732 × 100)/100 =
35.17316017316/100 ≈
35.17316017316% ≈
35.17%
The final answer:
written in three ways
As a positive proper fraction:
(the numerator < the denominator)
39/77 × 50/72 = 325/924
As a decimal number:
39/77 × 50/72 ≈ 0.35
As a percentage:
39/77 × 50/72 ≈ 35.17%
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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