Subtract 9/21 from 25/10, Solve 2 5/10

Subtract 9/21 from 25/10

1^st number: 2 5/10, 2^nd number: 9/21

25/10 - 9/21 is 29/14.

Find the least common denominator or LCM of the two denominators:
LCM of 10 and 21 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 10 × 21 = 210,
25/10 = 25 × 21/10 × 21 = 525/210
Likewise, for the 2nd fraction, since 21 × 10 = 210,
9/21 = 9 × 10/21 × 10 = 90/210
Subtract the two like fractions:
525/210 - 90/210 = 525 - 90/210 = 435/210
After reducing the fraction, the answer is 29/14
In mixed form: 21/14

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