Subtract 21/7 from 5/25, Solve 5/25

Subtract 21/7 from 5/25

1^st number: 5/25, 2^nd number: 3 0/7

5/25 - 21/7 is -14/5.

Find the least common denominator or LCM of the two denominators:
LCM of 25 and 7 is 175

Next, find the equivalent fraction of both fractional numbers with denominator 175
For the 1st fraction, since 25 × 7 = 175,
5/25 = 5 × 7/25 × 7 = 35/175
Likewise, for the 2nd fraction, since 7 × 25 = 175,
21/7 = 21 × 25/7 × 25 = 525/175
Subtract the two like fractions:
35/175 - 525/175 = 35 - 525/175 = -490/175
After reducing the fraction, the answer is -14/5

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