Subtract 40/42 from 20/5
1st number: 4 0/5, 2nd number: 40/42
20/5 - 40/42 is 64/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 5 × 42 = 210,
20/5 = 20 × 42/5 × 42 = 840/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
40/42 = 40 × 5/42 × 5 = 200/210 - Subtract the two like fractions:
840/210 - 200/210 = 840 - 200/210 = 640/210 - After reducing the fraction, the answer is 64/21
- In mixed form: 31/21
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