Subtract 21/36 from 6/40
6/40 - 21/36 is -13/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 36 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
6/40 = 6 × 9/40 × 9 = 54/360 - Likewise, for the 2nd fraction, since 36 × 10 = 360,
21/36 = 21 × 10/36 × 10 = 210/360 - Subtract the two like fractions:
54/360 - 210/360 = 54 - 210/360 = -156/360 - After reducing the fraction, the answer is -13/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/40-21/36 6/40-42/36 6/80-21/36 6/40-21/72 18/40-21/36 6/40-63/36 30/40-21/36 42/40-21/36