Subtract 21/40 from 15/25
15/25 - 21/40 is 3/40.
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,
15/25 = 15 × 8/25 × 8 = 120/200 - Likewise, for the 2nd fraction, since 40 × 5 = 200,
21/40 = 21 × 5/40 × 5 = 105/200 - Subtract the two like fractions:
120/200 - 105/200 = 120 - 105/200 = 15/200 - After reducing the fraction, the answer is 3/40
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