Subtract 20/18 from 72/40
1st number: 1 32/40, 2nd number: 1 2/18
72/40 - 20/18 is 31/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 18 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
72/40 = 72 × 9/40 × 9 = 648/360 - Likewise, for the 2nd fraction, since 18 × 20 = 360,
20/18 = 20 × 20/18 × 20 = 400/360 - Subtract the two like fractions:
648/360 - 400/360 = 648 - 400/360 = 248/360 - After reducing the fraction, the answer is 31/45
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