Subtract 63/21 from 6/15, Solve 6/15

Subtract 63/21 from 6/15

1^st number: 6/15, 2^nd number: 3 0/21

6/15 - 63/21 is -13/5.

Find the least common denominator or LCM of the two denominators:
LCM of 15 and 21 is 105

Next, find the equivalent fraction of both fractional numbers with denominator 105
For the 1st fraction, since 15 × 7 = 105,
6/15 = 6 × 7/15 × 7 = 42/105
Likewise, for the 2nd fraction, since 21 × 5 = 105,
63/21 = 63 × 5/21 × 5 = 315/105
Subtract the two like fractions:
42/105 - 315/105 = 42 - 315/105 = -273/105
After reducing the fraction, the answer is -13/5

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