Subtract 60/50 from 21/40, Solve 21/40

Subtract 60/50 from 21/40

1^st number: 21/40, 2^nd number: 1 10/50

21/40 - 60/50 is -27/40.

Find the least common denominator or LCM of the two denominators:
LCM of 40 and 50 is 200

Next, find the equivalent fraction of both fractional numbers with denominator 200
For the 1st fraction, since 40 × 5 = 200,
21/40 = 21 × 5/40 × 5 = 105/200
Likewise, for the 2nd fraction, since 50 × 4 = 200,
60/50 = 60 × 4/50 × 4 = 240/200
Subtract the two like fractions:
105/200 - 240/200 = 105 - 240/200 = -135/200
After reducing the fraction, the answer is -27/40

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