Subtract 21/10 from 42/4
1st number: 10 2/4, 2nd number: 2 1/10
42/4 - 21/10 is 42/5.
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,
42/4 = 42 × 5/4 × 5 = 210/20 - Likewise, for the 2nd fraction, since 10 × 2 = 20,
21/10 = 21 × 2/10 × 2 = 42/20 - Subtract the two like fractions:
210/20 - 42/20 = 210 - 42/20 = 168/20 - After reducing the fraction, the answer is 42/5
- In mixed form: 82/5
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