Subtract 42/9 from 84/30
1st number: 2 24/30, 2nd number: 4 6/9
84/30 - 42/9 is -28/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 9 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
84/30 = 84 × 3/30 × 3 = 252/90 - Likewise, for the 2nd fraction, since 9 × 10 = 90,
42/9 = 42 × 10/9 × 10 = 420/90 - Subtract the two like fractions:
252/90 - 420/90 = 252 - 420/90 = -168/90 - After reducing the fraction, the answer is -28/15
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