Subtract 15/42 from 18/5
1st number: 3 3/5, 2nd number: 15/42
18/5 - 15/42 is 227/70.
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,
18/5 = 18 × 42/5 × 42 = 756/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
15/42 = 15 × 5/42 × 5 = 75/210 - Subtract the two like fractions:
756/210 - 75/210 = 756 - 75/210 = 681/210 - After reducing the fraction, the answer is 227/70
- In mixed form: 317/70
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