Subtract 72/18 from 40/30
1st number: 1 10/30, 2nd number: 4 0/18
40/30 - 72/18 is -8/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
40/30 = 40 × 3/30 × 3 = 120/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
72/18 = 72 × 5/18 × 5 = 360/90 - Subtract the two like fractions:
120/90 - 360/90 = 120 - 360/90 = -240/90 - After reducing the fraction, the answer is -8/3
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