Subtract 15/24 from 21/7
1st number: 3 0/7, 2nd number: 15/24
21/7 - 15/24 is 19/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 24 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 7 × 24 = 168,
21/7 = 21 × 24/7 × 24 = 504/168 - Likewise, for the 2nd fraction, since 24 × 7 = 168,
15/24 = 15 × 7/24 × 7 = 105/168 - Subtract the two like fractions:
504/168 - 105/168 = 504 - 105/168 = 399/168 - After reducing the fraction, the answer is 19/8
- In mixed form: 23/8
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