Subtract 56/70 from 81/63, Solve 1 18/63

Subtract 56/70 from 81/63

1^st number: 1 18/63, 2^nd number: 56/70

81/63 - 56/70 is 17/35.

Find the least common denominator or LCM of the two denominators:
LCM of 63 and 70 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 63 × 10 = 630,
81/63 = 81 × 10/63 × 10 = 810/630
Likewise, for the 2nd fraction, since 70 × 9 = 630,
56/70 = 56 × 9/70 × 9 = 504/630
Subtract the two like fractions:
810/630 - 504/630 = 810 - 504/630 = 306/630
After reducing the fraction, the answer is 17/35

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