Subtract 21/80 from 70/20
1st number: 3 10/20, 2nd number: 21/80
70/20 - 21/80 is 259/80.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 20 × 4 = 80,
70/20 = 70 × 4/20 × 4 = 280/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
21/80 = 21 × 1/80 × 1 = 21/80 - Subtract the two like fractions:
280/80 - 21/80 = 280 - 21/80 = 259/80 - In mixed form: 319/80
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