Subtract 21/4 from 72/8
1st number: 9 0/8, 2nd number: 5 1/4
72/8 - 21/4 is 15/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 4 is 8
Next, find the equivalent fraction of both fractional numbers with denominator 8 - For the 1st fraction, since 8 × 1 = 8,
72/8 = 72 × 1/8 × 1 = 72/8 - Likewise, for the 2nd fraction, since 4 × 2 = 8,
21/4 = 21 × 2/4 × 2 = 42/8 - Subtract the two like fractions:
72/8 - 42/8 = 72 - 42/8 = 30/8 - After reducing the fraction, the answer is 15/4
- In mixed form: 33/4
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