Subtract 8/72 from 21/4
1st number: 5 1/4, 2nd number: 8/72
21/4 - 8/72 is 185/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 72 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 4 × 18 = 72,
21/4 = 21 × 18/4 × 18 = 378/72 - Likewise, for the 2nd fraction, since 72 × 1 = 72,
8/72 = 8 × 1/72 × 1 = 8/72 - Subtract the two like fractions:
378/72 - 8/72 = 378 - 8/72 = 370/72 - After reducing the fraction, the answer is 185/36
- In mixed form: 55/36
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