Subtract 18/21 from 80/20
1st number: 4 0/20, 2nd number: 18/21
80/20 - 18/21 is 22/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 21 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
80/20 = 80 × 21/20 × 21 = 1680/420 - Likewise, for the 2nd fraction, since 21 × 20 = 420,
18/21 = 18 × 20/21 × 20 = 360/420 - Subtract the two like fractions:
1680/420 - 360/420 = 1680 - 360/420 = 1320/420 - After reducing the fraction, the answer is 22/7
- In mixed form: 31/7
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