Subtract 4/80 from 28/40
28/40 - 4/80 is 13/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 40 × 2 = 80,
28/40 = 28 × 2/40 × 2 = 56/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
4/80 = 4 × 1/80 × 1 = 4/80 - Subtract the two like fractions:
56/80 - 4/80 = 56 - 4/80 = 52/80 - After reducing the fraction, the answer is 13/20
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