Subtract 84/30 from 24/42
1st number: 24/42, 2nd number: 2 24/30
24/42 - 84/30 is -78/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
24/42 = 24 × 5/42 × 5 = 120/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
84/30 = 84 × 7/30 × 7 = 588/210 - Subtract the two like fractions:
120/210 - 588/210 = 120 - 588/210 = -468/210 - After reducing the fraction, the answer is -78/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 48/42-84/30 24/84-84/30 24/42-84/60 72/42-84/30 24/42-84/90