Subtract 21/54 from 70/20
1st number: 3 10/20, 2nd number: 21/54
70/20 - 21/54 is 28/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 54 is 540
Next, find the equivalent fraction of both fractional numbers with denominator 540 - For the 1st fraction, since 20 × 27 = 540,
70/20 = 70 × 27/20 × 27 = 1890/540 - Likewise, for the 2nd fraction, since 54 × 10 = 540,
21/54 = 21 × 10/54 × 10 = 210/540 - Subtract the two like fractions:
1890/540 - 210/540 = 1890 - 210/540 = 1680/540 - After reducing the fraction, the answer is 28/9
- In mixed form: 31/9
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