Subtract 63/42 from 12/20
1st number: 12/20, 2nd number: 1 21/42
12/20 - 63/42 is -9/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 42 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
12/20 = 12 × 21/20 × 21 = 252/420 - Likewise, for the 2nd fraction, since 42 × 10 = 420,
63/42 = 63 × 10/42 × 10 = 630/420 - Subtract the two like fractions:
252/420 - 630/420 = 252 - 630/420 = -378/420 - After reducing the fraction, the answer is -9/10
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