Subtract 18/21 from 72/24
1st number: 3 0/24, 2nd number: 18/21
72/24 - 18/21 is 15/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 21 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 24 × 7 = 168,
72/24 = 72 × 7/24 × 7 = 504/168 - Likewise, for the 2nd fraction, since 21 × 8 = 168,
18/21 = 18 × 8/21 × 8 = 144/168 - Subtract the two like fractions:
504/168 - 144/168 = 504 - 144/168 = 360/168 - After reducing the fraction, the answer is 15/7
- In mixed form: 21/7
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