Subtract 21/81 from 49/20
1st number: 2 9/20, 2nd number: 21/81
49/20 - 21/81 is 1183/540.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 81 is 1620
Next, find the equivalent fraction of both fractional numbers with denominator 1620 - For the 1st fraction, since 20 × 81 = 1620,
49/20 = 49 × 81/20 × 81 = 3969/1620 - Likewise, for the 2nd fraction, since 81 × 20 = 1620,
21/81 = 21 × 20/81 × 20 = 420/1620 - Subtract the two like fractions:
3969/1620 - 420/1620 = 3969 - 420/1620 = 3549/1620 - After reducing the fraction, the answer is 1183/540
- In mixed form: 2103/540
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