Subtract 72/45 from 20/40
1st number: 20/40, 2nd number: 1 27/45
20/40 - 72/45 is -11/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 45 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
20/40 = 20 × 9/40 × 9 = 180/360 - Likewise, for the 2nd fraction, since 45 × 8 = 360,
72/45 = 72 × 8/45 × 8 = 576/360 - Subtract the two like fractions:
180/360 - 576/360 = 180 - 576/360 = -396/360 - After reducing the fraction, the answer is -11/10
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