Subtract 21/36 from 30/18
1st number: 1 12/18, 2nd number: 21/36
30/18 - 21/36 is 13/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 36 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 18 × 2 = 36,
30/18 = 30 × 2/18 × 2 = 60/36 - Likewise, for the 2nd fraction, since 36 × 1 = 36,
21/36 = 21 × 1/36 × 1 = 21/36 - Subtract the two like fractions:
60/36 - 21/36 = 60 - 21/36 = 39/36 - After reducing the fraction, the answer is 13/12
- In mixed form: 11/12
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