Subtract 10/15 from 72/42
1st number: 1 30/42, 2nd number: 10/15
72/42 - 10/15 is 22/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 15 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
72/42 = 72 × 5/42 × 5 = 360/210 - Likewise, for the 2nd fraction, since 15 × 14 = 210,
10/15 = 10 × 14/15 × 14 = 140/210 - Subtract the two like fractions:
360/210 - 140/210 = 360 - 140/210 = 220/210 - After reducing the fraction, the answer is 22/21
- In mixed form: 11/21
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