Subtract 18/10 from 72/45
1st number: 1 27/45, 2nd number: 1 8/10
72/45 - 18/10 is -1/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 10 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 45 × 2 = 90,
72/45 = 72 × 2/45 × 2 = 144/90 - Likewise, for the 2nd fraction, since 10 × 9 = 90,
18/10 = 18 × 9/10 × 9 = 162/90 - Subtract the two like fractions:
144/90 - 162/90 = 144 - 162/90 = -18/90 - After reducing the fraction, the answer is -1/5
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