Subtract 15/9 from 9/40
1st number: 9/40, 2nd number: 1 6/9
9/40 - 15/9 is -173/120.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 9 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
9/40 = 9 × 9/40 × 9 = 81/360 - Likewise, for the 2nd fraction, since 9 × 40 = 360,
15/9 = 15 × 40/9 × 40 = 600/360 - Subtract the two like fractions:
81/360 - 600/360 = 81 - 600/360 = -519/360 - After reducing the fraction, the answer is -173/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/40-15/9 9/40-30/9 9/80-15/9 9/40-15/18 27/40-15/9 9/40-45/9 9/40-15/27 45/40-15/9 9/40-75/9 9/40-15/45 63/40-15/9 9/40-15/63