Subtract 28/63 from 1/90
1/90 - 28/63 is -13/30.
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,
1/90 = 1 × 7/90 × 7 = 7/630 - Likewise, for the 2nd fraction, since 63 × 10 = 630,
28/63 = 28 × 10/63 × 10 = 280/630 - Subtract the two like fractions:
7/630 - 280/630 = 7 - 280/630 = -273/630 - After reducing the fraction, the answer is -13/30
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