Subtract 63/40 from 72/20
1st number: 3 12/20, 2nd number: 1 23/40
72/20 - 63/40 is 81/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 20 × 2 = 40,
72/20 = 72 × 2/20 × 2 = 144/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
63/40 = 63 × 1/40 × 1 = 63/40 - Subtract the two like fractions:
144/40 - 63/40 = 144 - 63/40 = 81/40 - In mixed form: 21/40
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