Subtract 20/42 from 90/5
1st number: 18 0/5, 2nd number: 20/42
90/5 - 20/42 is 368/21.
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,
90/5 = 90 × 42/5 × 42 = 3780/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
20/42 = 20 × 5/42 × 5 = 100/210 - Subtract the two like fractions:
3780/210 - 100/210 = 3780 - 100/210 = 3680/210 - After reducing the fraction, the answer is 368/21
- In mixed form: 1711/21
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