Subtract 21/18 from 20/48
1st number: 20/48, 2nd number: 1 3/18
20/48 - 21/18 is -3/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 48 and 18 is 144
Next, find the equivalent fraction of both fractional numbers with denominator 144 - For the 1st fraction, since 48 × 3 = 144,
20/48 = 20 × 3/48 × 3 = 60/144 - Likewise, for the 2nd fraction, since 18 × 8 = 144,
21/18 = 21 × 8/18 × 8 = 168/144 - Subtract the two like fractions:
60/144 - 168/144 = 60 - 168/144 = -108/144 - After reducing the fraction, the answer is -3/4
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