Subtract 5/90 from 20/63
20/63 - 5/90 is 11/42.
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,
20/63 = 20 × 10/63 × 10 = 200/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
5/90 = 5 × 7/90 × 7 = 35/630 - Subtract the two like fractions:
200/630 - 35/630 = 200 - 35/630 = 165/630 - After reducing the fraction, the answer is 11/42
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