Subtract 7/8 from 9/40
9/40 - 7/8 is -13/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 8 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 40 × 1 = 40,
9/40 = 9 × 1/40 × 1 = 9/40 - Likewise, for the 2nd fraction, since 8 × 5 = 40,
7/8 = 7 × 5/8 × 5 = 35/40 - Subtract the two like fractions:
9/40 - 35/40 = 9 - 35/40 = -26/40 - After reducing the fraction, the answer is -13/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/40-7/8 9/40-14/8 9/80-7/8 9/40-7/16 27/40-7/8 9/40-21/8 9/40-7/24 45/40-7/8 9/40-35/8 9/40-7/40 63/40-7/8 9/40-49/8 9/40-7/56