Subtract 90/54 from 50/21
1st number: 2 8/21, 2nd number: 1 36/54
50/21 - 90/54 is 5/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 54 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 21 × 18 = 378,
50/21 = 50 × 18/21 × 18 = 900/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
90/54 = 90 × 7/54 × 7 = 630/378 - Subtract the two like fractions:
900/378 - 630/378 = 900 - 630/378 = 270/378 - After reducing the fraction, the answer is 5/7
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