Subtract 7/25 from 70/21, Solve 3 7/21

Subtract 7/25 from 70/21

1^st number: 3 7/21, 2^nd number: 7/25

70/21 - 7/25 is 229/75.

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,
70/21 = 70 × 25/21 × 25 = 1750/525
Likewise, for the 2nd fraction, since 25 × 21 = 525,
7/25 = 7 × 21/25 × 21 = 147/525
Subtract the two like fractions:
1750/525 - 147/525 = 1750 - 147/525 = 1603/525
After reducing the fraction, the answer is 229/75
In mixed form: 34/75

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