Subtract 9/40 from 27/49
27/49 - 9/40 is 639/1960.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 40 is 1960
Next, find the equivalent fraction of both fractional numbers with denominator 1960 - For the 1st fraction, since 49 × 40 = 1960,
27/49 = 27 × 40/49 × 40 = 1080/1960 - Likewise, for the 2nd fraction, since 40 × 49 = 1960,
9/40 = 9 × 49/40 × 49 = 441/1960 - Subtract the two like fractions:
1080/1960 - 441/1960 = 1080 - 441/1960 = 639/1960
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/49-9/40 27/49-18/40 27/98-9/40 27/49-9/80 81/49-9/40 27/49-27/40 27/49-45/40 27/49-63/40