Subtract 4/21 from 35/15, Solve 2 5/15

Subtract 4/21 from 35/15

1^st number: 2 5/15, 2^nd number: 4/21

35/15 - 4/21 is 15/7.

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,
35/15 = 35 × 7/15 × 7 = 245/105
Likewise, for the 2nd fraction, since 21 × 5 = 105,
4/21 = 4 × 5/21 × 5 = 20/105
Subtract the two like fractions:
245/105 - 20/105 = 245 - 20/105 = 225/105
After reducing the fraction, the answer is 15/7
In mixed form: 21/7

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