Subtract 72/20 from 30/60
1st number: 30/60, 2nd number: 3 12/20
30/60 - 72/20 is -31/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 60 × 1 = 60,
30/60 = 30 × 1/60 × 1 = 30/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
72/20 = 72 × 3/20 × 3 = 216/60 - Subtract the two like fractions:
30/60 - 216/60 = 30 - 216/60 = -186/60 - After reducing the fraction, the answer is -31/10
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