Subtract 72/7 from 9/15, Solve 9/15

Subtract 72/7 from 9/15

1^st number: 9/15, 2^nd number: 10 2/7

9/15 - 72/7 is -339/35.

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,
72/7 = 72 × 15/7 × 15 = 1080/105
Subtract the two like fractions:
63/105 - 1080/105 = 63 - 1080/105 = -1017/105
After reducing the fraction, the answer is -339/35

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