Subtract 42/10 from 72/20
1st number: 3 12/20, 2nd number: 4 2/10
72/20 - 42/10 is -3/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 10 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 20 × 1 = 20,
72/20 = 72 × 1/20 × 1 = 72/20 - Likewise, for the 2nd fraction, since 10 × 2 = 20,
42/10 = 42 × 2/10 × 2 = 84/20 - Subtract the two like fractions:
72/20 - 84/20 = 72 - 84/20 = -12/20 - After reducing the fraction, the answer is -3/5
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