Subtract 42/48 from 10/20
10/20 - 42/48 is -3/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 48 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 20 × 12 = 240,
10/20 = 10 × 12/20 × 12 = 120/240 - Likewise, for the 2nd fraction, since 48 × 5 = 240,
42/48 = 42 × 5/48 × 5 = 210/240 - Subtract the two like fractions:
120/240 - 210/240 = 120 - 210/240 = -90/240 - After reducing the fraction, the answer is -3/8
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