Subtract 1/20 from 45/48
45/48 - 1/20 is 71/80.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 48 and 20 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 48 × 5 = 240,
45/48 = 45 × 5/48 × 5 = 225/240 - Likewise, for the 2nd fraction, since 20 × 12 = 240,
1/20 = 1 × 12/20 × 12 = 12/240 - Subtract the two like fractions:
225/240 - 12/240 = 225 - 12/240 = 213/240 - After reducing the fraction, the answer is 71/80
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