Subtract 90/72 from 7/4
1st number: 1 3/4, 2nd number: 1 18/72
7/4 - 90/72 is 1/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 72 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 4 × 18 = 72,
7/4 = 7 × 18/4 × 18 = 126/72 - Likewise, for the 2nd fraction, since 72 × 1 = 72,
90/72 = 90 × 1/72 × 1 = 90/72 - Subtract the two like fractions:
126/72 - 90/72 = 126 - 90/72 = 36/72 - After reducing the fraction, the answer is 1/2
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