Subtract 6/20 from 72/42
1st number: 1 30/42, 2nd number: 6/20
72/42 - 6/20 is 99/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 42 × 10 = 420,
72/42 = 72 × 10/42 × 10 = 720/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
6/20 = 6 × 21/20 × 21 = 126/420 - Subtract the two like fractions:
720/420 - 126/420 = 720 - 126/420 = 594/420 - After reducing the fraction, the answer is 99/70
- In mixed form: 129/70
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