Subtract 21/80 from 70/42
1st number: 1 28/42, 2nd number: 21/80
70/42 - 21/80 is 337/240.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 42 × 40 = 1680,
70/42 = 70 × 40/42 × 40 = 2800/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
21/80 = 21 × 21/80 × 21 = 441/1680 - Subtract the two like fractions:
2800/1680 - 441/1680 = 2800 - 441/1680 = 2359/1680 - After reducing the fraction, the answer is 337/240
- In mixed form: 197/240
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