Subtract 35/25 from 7/21, Solve 7/21

Subtract 35/25 from 7/21

1^st number: 7/21, 2^nd number: 1 10/25

7/21 - 35/25 is -16/15.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 25 is 525

Next, find the equivalent fraction of both fractional numbers with denominator 525
For the 1st fraction, since 21 × 25 = 525,
7/21 = 7 × 25/21 × 25 = 175/525
Likewise, for the 2nd fraction, since 25 × 21 = 525,
35/25 = 35 × 21/25 × 21 = 735/525
Subtract the two like fractions:
175/525 - 735/525 = 175 - 735/525 = -560/525
After reducing the fraction, the answer is -16/15

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