Subtract 30/7 from 90/54
1st number: 1 36/54, 2nd number: 4 2/7
90/54 - 30/7 is -55/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 7 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 54 × 7 = 378,
90/54 = 90 × 7/54 × 7 = 630/378 - Likewise, for the 2nd fraction, since 7 × 54 = 378,
30/7 = 30 × 54/7 × 54 = 1620/378 - Subtract the two like fractions:
630/378 - 1620/378 = 630 - 1620/378 = -990/378 - After reducing the fraction, the answer is -55/21
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