Subtract 20/72 from 5/4
1st number: 1 1/4, 2nd number: 20/72
5/4 - 20/72 is 35/36.
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,
5/4 = 5 × 18/4 × 18 = 90/72 - Likewise, for the 2nd fraction, since 72 × 1 = 72,
20/72 = 20 × 1/72 × 1 = 20/72 - Subtract the two like fractions:
90/72 - 20/72 = 90 - 20/72 = 70/72 - After reducing the fraction, the answer is 35/36
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