Subtract 15/27 from 7/40
7/40 - 15/27 is -137/360.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 27 is 1080
Next, find the equivalent fraction of both fractional numbers with denominator 1080 - For the 1st fraction, since 40 × 27 = 1080,
7/40 = 7 × 27/40 × 27 = 189/1080 - Likewise, for the 2nd fraction, since 27 × 40 = 1080,
15/27 = 15 × 40/27 × 40 = 600/1080 - Subtract the two like fractions:
189/1080 - 600/1080 = 189 - 600/1080 = -411/1080 - After reducing the fraction, the answer is -137/360
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/40-15/27 7/40-30/27 7/80-15/27 7/40-15/54 21/40-15/27 7/40-45/27 7/40-15/81 35/40-15/27 7/40-75/27 49/40-15/27