Subtract 20/42 from 45/30
1st number: 1 15/30, 2nd number: 20/42
45/30 - 20/42 is 43/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
45/30 = 45 × 7/30 × 7 = 315/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
20/42 = 20 × 5/42 × 5 = 100/210 - Subtract the two like fractions:
315/210 - 100/210 = 315 - 100/210 = 215/210 - After reducing the fraction, the answer is 43/42
- In mixed form: 11/42
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