Subtract 90/60 from 12/20
1st number: 12/20, 2nd number: 1 30/60
12/20 - 90/60 is -9/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 60 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
12/20 = 12 × 3/20 × 3 = 36/60 - Likewise, for the 2nd fraction, since 60 × 1 = 60,
90/60 = 90 × 1/60 × 1 = 90/60 - Subtract the two like fractions:
36/60 - 90/60 = 36 - 90/60 = -54/60 - After reducing the fraction, the answer is -9/10
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