Subtract 84/40 from 15/9
1st number: 1 6/9, 2nd number: 2 4/40
15/9 - 84/40 is -13/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 9 × 40 = 360,
15/9 = 15 × 40/9 × 40 = 600/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
84/40 = 84 × 9/40 × 9 = 756/360 - Subtract the two like fractions:
600/360 - 756/360 = 600 - 756/360 = -156/360 - After reducing the fraction, the answer is -13/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/9-84/40 15/18-84/40 15/9-84/80 45/9-84/40 15/27-84/40 75/9-84/40 15/45-84/40 15/63-84/40