Subtract 21/14 from 21/15, Solve 1 6/15

Subtract 21/14 from 21/15

1^st number: 1 6/15, 2^nd number: 1 7/14

21/15 - 21/14 is -1/10.

Find the least common denominator or LCM of the two denominators:
LCM of 15 and 14 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 15 × 14 = 210,
21/15 = 21 × 14/15 × 14 = 294/210
Likewise, for the 2nd fraction, since 14 × 15 = 210,
21/14 = 21 × 15/14 × 15 = 315/210
Subtract the two like fractions:
294/210 - 315/210 = 294 - 315/210 = -21/210
After reducing the fraction, the answer is -1/10

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