Subtract 80/60 from 21/90
1st number: 21/90, 2nd number: 1 20/60
21/90 - 80/60 is -11/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 60 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 90 × 2 = 180,
21/90 = 21 × 2/90 × 2 = 42/180 - Likewise, for the 2nd fraction, since 60 × 3 = 180,
80/60 = 80 × 3/60 × 3 = 240/180 - Subtract the two like fractions:
42/180 - 240/180 = 42 - 240/180 = -198/180 - After reducing the fraction, the answer is -11/10
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