Subtract 10/7 from 4/72, Solve 4/72

Subtract 10/7 from 4/72

1^st number: 4/72, 2^nd number: 1 3/7

4/72 - 10/7 is -173/126.

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

Next, find the equivalent fraction of both fractional numbers with denominator 504
For the 1st fraction, since 72 × 7 = 504,
4/72 = 4 × 7/72 × 7 = 28/504
Likewise, for the 2nd fraction, since 7 × 72 = 504,
10/7 = 10 × 72/7 × 72 = 720/504
Subtract the two like fractions:
28/504 - 720/504 = 28 - 720/504 = -692/504
After reducing the fraction, the answer is -173/126

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