Subtract 90/42 from 4/15, Solve 4/15

Subtract 90/42 from 4/15

1^st number: 4/15, 2^nd number: 2 6/42

4/15 - 90/42 is -197/105.

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,
4/15 = 4 × 14/15 × 14 = 56/210
Likewise, for the 2nd fraction, since 42 × 5 = 210,
90/42 = 90 × 5/42 × 5 = 450/210
Subtract the two like fractions:
56/210 - 450/210 = 56 - 450/210 = -394/210
After reducing the fraction, the answer is -197/105

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