Subtract 36/40 from 18/49
18/49 - 36/40 is -261/490.
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,
18/49 = 18 × 40/49 × 40 = 720/1960 - Likewise, for the 2nd fraction, since 40 × 49 = 1960,
36/40 = 36 × 49/40 × 49 = 1764/1960 - Subtract the two like fractions:
720/1960 - 1764/1960 = 720 - 1764/1960 = -1044/1960 - After reducing the fraction, the answer is -261/490
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/49-36/40 18/49-72/40 18/98-36/40 18/49-36/80 54/49-36/40 90/49-36/40