Subtract 90/84 from 72/20
1st number: 3 12/20, 2nd number: 1 6/84
72/20 - 90/84 is 177/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
72/20 = 72 × 21/20 × 21 = 1512/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
90/84 = 90 × 5/84 × 5 = 450/420 - Subtract the two like fractions:
1512/420 - 450/420 = 1512 - 450/420 = 1062/420 - After reducing the fraction, the answer is 177/70
- In mixed form: 237/70
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