Subtract 10/63 from 10/90
10/90 - 10/63 is -1/21.
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,
10/90 = 10 × 7/90 × 7 = 70/630 - Likewise, for the 2nd fraction, since 63 × 10 = 630,
10/63 = 10 × 10/63 × 10 = 100/630 - Subtract the two like fractions:
70/630 - 100/630 = 70 - 100/630 = -30/630 - After reducing the fraction, the answer is -1/21
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