Subtract 9/40 from 21/25
21/25 - 9/40 is 123/200.
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,
9/40 = 9 × 5/40 × 5 = 45/200 - Subtract the two like fractions:
168/200 - 45/200 = 168 - 45/200 = 123/200
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