Subtract 2/7 from 9/40
9/40 - 2/7 is -17/280.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 7 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 40 × 7 = 280,
9/40 = 9 × 7/40 × 7 = 63/280 - Likewise, for the 2nd fraction, since 7 × 40 = 280,
2/7 = 2 × 40/7 × 40 = 80/280 - Subtract the two like fractions:
63/280 - 80/280 = 63 - 80/280 = -17/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/40-2/7 9/40-4/7 9/80-2/7 9/40-2/14 27/40-2/7 9/40-6/7 9/40-2/21 45/40-2/7 9/40-10/7 9/40-2/35 63/40-2/7 9/40-14/7 9/40-2/49