Subtract 20/72 from 10/7, Solve 1 3/7

Subtract 20/72 from 10/7

1^st number: 1 3/7, 2^nd number: 20/72

10/7 - 20/72 is 145/126.

Find the least common denominator or LCM of the two denominators:
LCM of 7 and 72 is 504

Next, find the equivalent fraction of both fractional numbers with denominator 504
For the 1st fraction, since 7 × 72 = 504,
10/7 = 10 × 72/7 × 72 = 720/504
Likewise, for the 2nd fraction, since 72 × 7 = 504,
20/72 = 20 × 7/72 × 7 = 140/504
Subtract the two like fractions:
720/504 - 140/504 = 720 - 140/504 = 580/504
After reducing the fraction, the answer is 145/126
In mixed form: 119/126

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