Subtract 45/54 from 90/21
1st number: 4 6/21, 2nd number: 45/54
90/21 - 45/54 is 145/42.
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,
90/21 = 90 × 18/21 × 18 = 1620/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
45/54 = 45 × 7/54 × 7 = 315/378 - Subtract the two like fractions:
1620/378 - 315/378 = 1620 - 315/378 = 1305/378 - After reducing the fraction, the answer is 145/42
- In mixed form: 319/42
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