Subtract 1/10 from 72/20
1st number: 3 12/20, 2nd number: 1/10
72/20 - 1/10 is 7/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 10 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 20 × 1 = 20,
72/20 = 72 × 1/20 × 1 = 72/20 - Likewise, for the 2nd fraction, since 10 × 2 = 20,
1/10 = 1 × 2/10 × 2 = 2/20 - Subtract the two like fractions:
72/20 - 2/20 = 72 - 2/20 = 70/20 - After reducing the fraction, the answer is 7/2
- In mixed form: 31/2
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