Subtract 50/21 from 40/25, Solve 1 15/25

Subtract 50/21 from 40/25

1^st number: 1 15/25, 2^nd number: 2 8/21

40/25 - 50/21 is -82/105.

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,
40/25 = 40 × 21/25 × 21 = 840/525
Likewise, for the 2nd fraction, since 21 × 25 = 525,
50/21 = 50 × 25/21 × 25 = 1250/525
Subtract the two like fractions:
840/525 - 1250/525 = 840 - 1250/525 = -410/525
After reducing the fraction, the answer is -82/105

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