Subtract 30/7 from 90/45
1st number: 2 0/45, 2nd number: 4 2/7
90/45 - 30/7 is -16/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 7 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 45 × 7 = 315,
90/45 = 90 × 7/45 × 7 = 630/315 - Likewise, for the 2nd fraction, since 7 × 45 = 315,
30/7 = 30 × 45/7 × 45 = 1350/315 - Subtract the two like fractions:
630/315 - 1350/315 = 630 - 1350/315 = -720/315 - After reducing the fraction, the answer is -16/7
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