Subtract 72/30 from 35/42, Solve 35/42

Subtract 72/30 from 35/42

1^st number: 35/42, 2^nd number: 2 12/30

35/42 - 72/30 is -47/30.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 30 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 42 × 5 = 210,
35/42 = 35 × 5/42 × 5 = 175/210
Likewise, for the 2nd fraction, since 30 × 7 = 210,
72/30 = 72 × 7/30 × 7 = 504/210
Subtract the two like fractions:
175/210 - 504/210 = 175 - 504/210 = -329/210
After reducing the fraction, the answer is -47/30

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