Subtract 15/7 from 30/15, Solve 2 0/15

Subtract 15/7 from 30/15

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

30/15 - 15/7 is -1/7.

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,
30/15 = 30 × 7/15 × 7 = 210/105
Likewise, for the 2nd fraction, since 7 × 15 = 105,
15/7 = 15 × 15/7 × 15 = 225/105
Subtract the two like fractions:
210/105 - 225/105 = 210 - 225/105 = -15/105
After reducing the fraction, the answer is -1/7

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