Subtract 15/30 from 84/40
1st number: 2 4/40, 2nd number: 15/30
84/40 - 15/30 is 8/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 30 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 40 × 3 = 120,
84/40 = 84 × 3/40 × 3 = 252/120 - Likewise, for the 2nd fraction, since 30 × 4 = 120,
15/30 = 15 × 4/30 × 4 = 60/120 - Subtract the two like fractions:
252/120 - 60/120 = 252 - 60/120 = 192/120 - After reducing the fraction, the answer is 8/5
- In mixed form: 13/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/80-15/30 84/40-15/60 84/40-45/30 84/40-15/90 84/40-75/30