Subtract 21/90 from 20/60
20/60 - 21/90 is 1/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 60 × 3 = 180,
20/60 = 20 × 3/60 × 3 = 60/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
21/90 = 21 × 2/90 × 2 = 42/180 - Subtract the two like fractions:
60/180 - 42/180 = 60 - 42/180 = 18/180 - After reducing the fraction, the answer is 1/10
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