Subtract 56/21 from 40/75, Solve 40/75

Subtract 56/21 from 40/75

1^st number: 40/75, 2^nd number: 2 14/21

40/75 - 56/21 is -32/15.

Find the least common denominator or LCM of the two denominators:
LCM of 75 and 21 is 525

Next, find the equivalent fraction of both fractional numbers with denominator 525
For the 1st fraction, since 75 × 7 = 525,
40/75 = 40 × 7/75 × 7 = 280/525
Likewise, for the 2nd fraction, since 21 × 25 = 525,
56/21 = 56 × 25/21 × 25 = 1400/525
Subtract the two like fractions:
280/525 - 1400/525 = 280 - 1400/525 = -1120/525
After reducing the fraction, the answer is -32/15

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