Subtract 42/40 from 21/25
1st number: 21/25, 2nd number: 1 2/40
21/25 - 42/40 is -21/100.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 40 is 200
Next, find the equivalent fraction of both fractional numbers with denominator 200 - For the 1st fraction, since 25 × 8 = 200,
21/25 = 21 × 8/25 × 8 = 168/200 - Likewise, for the 2nd fraction, since 40 × 5 = 200,
42/40 = 42 × 5/40 × 5 = 210/200 - Subtract the two like fractions:
168/200 - 210/200 = 168 - 210/200 = -42/200 - After reducing the fraction, the answer is -21/100
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