Subtract 20/84 from 42/30
1st number: 1 12/30, 2nd number: 20/84
42/30 - 20/84 is 122/105.
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,
42/30 = 42 × 14/30 × 14 = 588/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
20/84 = 20 × 5/84 × 5 = 100/420 - Subtract the two like fractions:
588/420 - 100/420 = 588 - 100/420 = 488/420 - After reducing the fraction, the answer is 122/105
- In mixed form: 117/105
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