Subtract 9/28 from 36/40
36/40 - 9/28 is 81/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 28 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 40 × 7 = 280,
36/40 = 36 × 7/40 × 7 = 252/280 - Likewise, for the 2nd fraction, since 28 × 10 = 280,
9/28 = 9 × 10/28 × 10 = 90/280 - Subtract the two like fractions:
252/280 - 90/280 = 252 - 90/280 = 162/280 - After reducing the fraction, the answer is 81/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/40-9/28 36/40-18/28 36/80-9/28 36/40-9/56 36/40-27/28 36/40-9/84 36/40-45/28 36/40-63/28