Subtract 12/20 from 42/35, Solve 1 7/35

Subtract 12/20 from 42/35

1^st number: 1 7/35, 2^nd number: 12/20

42/35 - 12/20 is 3/5.

Find the least common denominator or LCM of the two denominators:
LCM of 35 and 20 is 140

Next, find the equivalent fraction of both fractional numbers with denominator 140
For the 1st fraction, since 35 × 4 = 140,
42/35 = 42 × 4/35 × 4 = 168/140
Likewise, for the 2nd fraction, since 20 × 7 = 140,
12/20 = 12 × 7/20 × 7 = 84/140
Subtract the two like fractions:
168/140 - 84/140 = 168 - 84/140 = 84/140
After reducing the fraction, the answer is 3/5

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