Subtract 45/10 from 72/20
1st number: 3 12/20, 2nd number: 4 5/10
72/20 - 45/10 is -9/10.
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,
45/10 = 45 × 2/10 × 2 = 90/20 - Subtract the two like fractions:
72/20 - 90/20 = 72 - 90/20 = -18/20 - After reducing the fraction, the answer is -9/10
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