Subtract 81/35 from 4/15, Solve 4/15

Subtract 81/35 from 4/15

1^st number: 4/15, 2^nd number: 2 11/35

4/15 - 81/35 is -43/21.

Find the least common denominator or LCM of the two denominators:
LCM of 15 and 35 is 105

Next, find the equivalent fraction of both fractional numbers with denominator 105
For the 1st fraction, since 15 × 7 = 105,
4/15 = 4 × 7/15 × 7 = 28/105
Likewise, for the 2nd fraction, since 35 × 3 = 105,
81/35 = 81 × 3/35 × 3 = 243/105
Subtract the two like fractions:
28/105 - 243/105 = 28 - 243/105 = -215/105
After reducing the fraction, the answer is -43/21

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