Subtract 21/5 from 42/2
1st number: 21 0/2, 2nd number: 4 1/5
42/2 - 21/5 is 84/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 5 is 10
Next, find the equivalent fraction of both fractional numbers with denominator 10 - For the 1st fraction, since 2 × 5 = 10,
42/2 = 42 × 5/2 × 5 = 210/10 - Likewise, for the 2nd fraction, since 5 × 2 = 10,
21/5 = 21 × 2/5 × 2 = 42/10 - Subtract the two like fractions:
210/10 - 42/10 = 210 - 42/10 = 168/10 - After reducing the fraction, the answer is 84/5
- In mixed form: 164/5
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