Subtract 80/21 from 75/20
1st number: 3 15/20, 2nd number: 3 17/21
75/20 - 80/21 is -5/84.
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,
75/20 = 75 × 21/20 × 21 = 1575/420 - Likewise, for the 2nd fraction, since 21 × 20 = 420,
80/21 = 80 × 20/21 × 20 = 1600/420 - Subtract the two like fractions:
1575/420 - 1600/420 = 1575 - 1600/420 = -25/420 - After reducing the fraction, the answer is -5/84
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