Subtract 98/90 from 45/63
1st number: 45/63, 2nd number: 1 8/90
45/63 - 98/90 is -118/315.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 63 × 10 = 630,
45/63 = 45 × 10/63 × 10 = 450/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
98/90 = 98 × 7/90 × 7 = 686/630 - Subtract the two like fractions:
450/630 - 686/630 = 450 - 686/630 = -236/630 - After reducing the fraction, the answer is -118/315
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Related: 90/63-98/90