Subtract 9/72 from 84/42
1st number: 2 0/42, 2nd number: 9/72
84/42 - 9/72 is 15/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 42 × 12 = 504,
84/42 = 84 × 12/42 × 12 = 1008/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
9/72 = 9 × 7/72 × 7 = 63/504 - Subtract the two like fractions:
1008/504 - 63/504 = 1008 - 63/504 = 945/504 - After reducing the fraction, the answer is 15/8
- In mixed form: 17/8
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