Subtract 21/63 from 90/20
1st number: 4 10/20, 2nd number: 21/63
90/20 - 21/63 is 25/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 63 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 20 × 63 = 1260,
90/20 = 90 × 63/20 × 63 = 5670/1260 - Likewise, for the 2nd fraction, since 63 × 20 = 1260,
21/63 = 21 × 20/63 × 20 = 420/1260 - Subtract the two like fractions:
5670/1260 - 420/1260 = 5670 - 420/1260 = 5250/1260 - After reducing the fraction, the answer is 25/6
- In mixed form: 41/6
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