Subtract 20/8 from 72/4
1st number: 18 0/4, 2nd number: 2 4/8
72/4 - 20/8 is 31/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 8 is 8
Next, find the equivalent fraction of both fractional numbers with denominator 8 - For the 1st fraction, since 4 × 2 = 8,
72/4 = 72 × 2/4 × 2 = 144/8 - Likewise, for the 2nd fraction, since 8 × 1 = 8,
20/8 = 20 × 1/8 × 1 = 20/8 - Subtract the two like fractions:
144/8 - 20/8 = 144 - 20/8 = 124/8 - After reducing the fraction, the answer is 31/2
- In mixed form: 151/2
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