Subtract 2/15 from 21/36
21/36 - 2/15 is 9/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 15 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 15 × 12 = 180,
2/15 = 2 × 12/15 × 12 = 24/180 - Subtract the two like fractions:
105/180 - 24/180 = 105 - 24/180 = 81/180 - After reducing the fraction, the answer is 9/20
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