Subtract 42/21 from 7/25, Solve 7/25

Subtract 42/21 from 7/25

1^st number: 7/25, 2^nd number: 2 0/21

7/25 - 42/21 is -43/25.

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

Next, find the equivalent fraction of both fractional numbers with denominator 525
For the 1st fraction, since 25 × 21 = 525,
7/25 = 7 × 21/25 × 21 = 147/525
Likewise, for the 2nd fraction, since 21 × 25 = 525,
42/21 = 42 × 25/21 × 25 = 1050/525
Subtract the two like fractions:
147/525 - 1050/525 = 147 - 1050/525 = -903/525
After reducing the fraction, the answer is -43/25

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