Subtract 21/10 from 72/4
1st number: 18 0/4, 2nd number: 2 1/10
72/4 - 21/10 is 159/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 10 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 4 × 5 = 20,
72/4 = 72 × 5/4 × 5 = 360/20 - Likewise, for the 2nd fraction, since 10 × 2 = 20,
21/10 = 21 × 2/10 × 2 = 42/20 - Subtract the two like fractions:
360/20 - 42/20 = 360 - 42/20 = 318/20 - After reducing the fraction, the answer is 159/10
- In mixed form: 159/10
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