Subtract 21/54 from 15/7
1st number: 2 1/7, 2nd number: 21/54
15/7 - 21/54 is 221/126.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 54 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 7 × 54 = 378,
15/7 = 15 × 54/7 × 54 = 810/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
21/54 = 21 × 7/54 × 7 = 147/378 - Subtract the two like fractions:
810/378 - 147/378 = 810 - 147/378 = 663/378 - After reducing the fraction, the answer is 221/126
- In mixed form: 195/126
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