Subtract 10/42 from 18/15, Solve 1 3/15

Subtract 10/42 from 18/15

1^st number: 1 3/15, 2^nd number: 10/42

18/15 - 10/42 is 101/105.

Find the least common denominator or LCM of the two denominators:
LCM of 15 and 42 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 15 × 14 = 210,
18/15 = 18 × 14/15 × 14 = 252/210
Likewise, for the 2nd fraction, since 42 × 5 = 210,
10/42 = 10 × 5/42 × 5 = 50/210
Subtract the two like fractions:
252/210 - 50/210 = 252 - 50/210 = 202/210
After reducing the fraction, the answer is 101/105

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