Subtract 21/36 from 18/4
1st number: 4 2/4, 2nd number: 21/36
18/4 - 21/36 is 47/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 36 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 4 × 9 = 36,
18/4 = 18 × 9/4 × 9 = 162/36 - Likewise, for the 2nd fraction, since 36 × 1 = 36,
21/36 = 21 × 1/36 × 1 = 21/36 - Subtract the two like fractions:
162/36 - 21/36 = 162 - 21/36 = 141/36 - After reducing the fraction, the answer is 47/12
- In mixed form: 311/12
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