Subtract 81/63 from 4/90
1st number: 4/90, 2nd number: 1 18/63
4/90 - 81/63 is -391/315.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 63 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
4/90 = 4 × 7/90 × 7 = 28/630 - Likewise, for the 2nd fraction, since 63 × 10 = 630,
81/63 = 81 × 10/63 × 10 = 810/630 - Subtract the two like fractions:
28/630 - 810/630 = 28 - 810/630 = -782/630 - After reducing the fraction, the answer is -391/315
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