Subtract 72/20 from 21/2
1st number: 10 1/2, 2nd number: 3 12/20
21/2 - 72/20 is 69/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 2 × 10 = 20,
21/2 = 21 × 10/2 × 10 = 210/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
72/20 = 72 × 1/20 × 1 = 72/20 - Subtract the two like fractions:
210/20 - 72/20 = 210 - 72/20 = 138/20 - After reducing the fraction, the answer is 69/10
- In mixed form: 69/10
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