Subtract 80/21 from 35/25, Solve 1 10/25

Subtract 80/21 from 35/25

1^st number: 1 10/25, 2^nd number: 3 17/21

35/25 - 80/21 is -253/105.

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,
35/25 = 35 × 21/25 × 21 = 735/525
Likewise, for the 2nd fraction, since 21 × 25 = 525,
80/21 = 80 × 25/21 × 25 = 2000/525
Subtract the two like fractions:
735/525 - 2000/525 = 735 - 2000/525 = -1265/525
After reducing the fraction, the answer is -253/105

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