Subtract 21/84 from 72/30
1st number: 2 12/30, 2nd number: 21/84
72/30 - 21/84 is 43/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 30 × 14 = 420,
72/30 = 72 × 14/30 × 14 = 1008/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
21/84 = 21 × 5/84 × 5 = 105/420 - Subtract the two like fractions:
1008/420 - 105/420 = 1008 - 105/420 = 903/420 - After reducing the fraction, the answer is 43/20
- In mixed form: 23/20
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