Subtract 7/40 from 9/28
9/28 - 7/40 is 41/280.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 28 × 10 = 280,
9/28 = 9 × 10/28 × 10 = 90/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
7/40 = 7 × 7/40 × 7 = 49/280 - Subtract the two like fractions:
90/280 - 49/280 = 90 - 49/280 = 41/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/28-7/40 9/28-14/40 9/56-7/40 9/28-7/80 27/28-7/40 9/28-21/40 9/84-7/40 45/28-7/40 9/28-35/40 63/28-7/40 9/28-49/40