Subtract 63/40 from 21/75, Solve 21/75

Subtract 63/40 from 21/75

1^st number: 21/75, 2^nd number: 1 23/40

21/75 - 63/40 is -259/200.

Find the least common denominator or LCM of the two denominators:
LCM of 75 and 40 is 600

Next, find the equivalent fraction of both fractional numbers with denominator 600
For the 1st fraction, since 75 × 8 = 600,
21/75 = 21 × 8/75 × 8 = 168/600
Likewise, for the 2nd fraction, since 40 × 15 = 600,
63/40 = 63 × 15/40 × 15 = 945/600
Subtract the two like fractions:
168/600 - 945/600 = 168 - 945/600 = -777/600
After reducing the fraction, the answer is -259/200

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