Subtract 81/10 from 28/63
1st number: 28/63, 2nd number: 8 1/10
28/63 - 81/10 is -689/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 10 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 63 × 10 = 630,
28/63 = 28 × 10/63 × 10 = 280/630 - Likewise, for the 2nd fraction, since 10 × 63 = 630,
81/10 = 81 × 63/10 × 63 = 5103/630 - Subtract the two like fractions:
280/630 - 5103/630 = 280 - 5103/630 = -4823/630 - After reducing the fraction, the answer is -689/90
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