Subtract 6/10 from 72/42, Solve 1 30/42

Subtract 6/10 from 72/42

1^st number: 1 30/42, 2^nd number: 6/10

72/42 - 6/10 is 39/35.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 10 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 42 × 5 = 210,
72/42 = 72 × 5/42 × 5 = 360/210
Likewise, for the 2nd fraction, since 10 × 21 = 210,
6/10 = 6 × 21/10 × 21 = 126/210
Subtract the two like fractions:
360/210 - 126/210 = 360 - 126/210 = 234/210
After reducing the fraction, the answer is 39/35
In mixed form: 14/35

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