Subtract 3/40 from 20/28
20/28 - 3/40 is 179/280.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 28 × 10 = 280,
20/28 = 20 × 10/28 × 10 = 200/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
3/40 = 3 × 7/40 × 7 = 21/280 - Subtract the two like fractions:
200/280 - 21/280 = 200 - 21/280 = 179/280
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