Subtract 10/20 from 21/36
21/36 - 10/20 is 1/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 36 × 5 = 180,
21/36 = 21 × 5/36 × 5 = 105/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
10/20 = 10 × 9/20 × 9 = 90/180 - Subtract the two like fractions:
105/180 - 90/180 = 105 - 90/180 = 15/180 - After reducing the fraction, the answer is 1/12
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