Subtract 14/25 from 7/21, Solve 7/21

Subtract 14/25 from 7/21

7/21 - 14/25 is -17/75.

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,
14/25 = 14 × 21/25 × 21 = 294/525
Subtract the two like fractions:
175/525 - 294/525 = 175 - 294/525 = -119/525
After reducing the fraction, the answer is -17/75

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