Subtract 20/42 from 75/30
1st number: 2 15/30, 2nd number: 20/42
75/30 - 20/42 is 85/42.
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,
75/30 = 75 × 7/30 × 7 = 525/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
20/42 = 20 × 5/42 × 5 = 100/210 - Subtract the two like fractions:
525/210 - 100/210 = 525 - 100/210 = 425/210 - After reducing the fraction, the answer is 85/42
- In mixed form: 21/42
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