Subtract 70/72 from 27/7, Solve 3 6/7

Subtract 70/72 from 27/7

1^st number: 3 6/7, 2^nd number: 70/72

27/7 - 70/72 is 727/252.

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,
27/7 = 27 × 72/7 × 72 = 1944/504
Likewise, for the 2nd fraction, since 72 × 7 = 504,
70/72 = 70 × 7/72 × 7 = 490/504
Subtract the two like fractions:
1944/504 - 490/504 = 1944 - 490/504 = 1454/504
After reducing the fraction, the answer is 727/252
In mixed form: 2223/252

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