Subtract 42/70 from 15/7, Solve 2 1/7

Subtract 42/70 from 15/7

1^st number: 2 1/7, 2^nd number: 42/70

15/7 - 42/70 is 54/35.

Find the least common denominator or LCM of the two denominators:
LCM of 7 and 70 is 70

Next, find the equivalent fraction of both fractional numbers with denominator 70
For the 1st fraction, since 7 × 10 = 70,
15/7 = 15 × 10/7 × 10 = 150/70
Likewise, for the 2nd fraction, since 70 × 1 = 70,
42/70 = 42 × 1/70 × 1 = 42/70
Subtract the two like fractions:
150/70 - 42/70 = 150 - 42/70 = 108/70
After reducing the fraction, the answer is 54/35
In mixed form: 119/35

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