Subtract 72/4 from 45/18
1st number: 2 9/18, 2nd number: 18 0/4
45/18 - 72/4 is -31/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 4 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 18 × 2 = 36,
45/18 = 45 × 2/18 × 2 = 90/36 - Likewise, for the 2nd fraction, since 4 × 9 = 36,
72/4 = 72 × 9/4 × 9 = 648/36 - Subtract the two like fractions:
90/36 - 648/36 = 90 - 648/36 = -558/36 - After reducing the fraction, the answer is -31/2
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