Subtract 42/7 from 9/15, Solve 9/15

Subtract 42/7 from 9/15

1^st number: 9/15, 2^nd number: 6 0/7

9/15 - 42/7 is -27/5.

Find the least common denominator or LCM of the two denominators:
LCM of 15 and 7 is 105

Next, find the equivalent fraction of both fractional numbers with denominator 105
For the 1st fraction, since 15 × 7 = 105,
9/15 = 9 × 7/15 × 7 = 63/105
Likewise, for the 2nd fraction, since 7 × 15 = 105,
42/7 = 42 × 15/7 × 15 = 630/105
Subtract the two like fractions:
63/105 - 630/105 = 63 - 630/105 = -567/105
After reducing the fraction, the answer is -27/5

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