Subtract 5/7 from 42/20, Solve 2 2/20

Subtract 5/7 from 42/20

1^st number: 2 2/20, 2^nd number: 5/7

42/20 - 5/7 is 97/70.

Find the least common denominator or LCM of the two denominators:
LCM of 20 and 7 is 140

Next, find the equivalent fraction of both fractional numbers with denominator 140
For the 1st fraction, since 20 × 7 = 140,
42/20 = 42 × 7/20 × 7 = 294/140
Likewise, for the 2nd fraction, since 7 × 20 = 140,
5/7 = 5 × 20/7 × 20 = 100/140
Subtract the two like fractions:
294/140 - 100/140 = 294 - 100/140 = 194/140
After reducing the fraction, the answer is 97/70
In mixed form: 127/70

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