Subtract 25/40 from 18/49
18/49 - 25/40 is -101/392.
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,
25/40 = 25 × 49/40 × 49 = 1225/1960 - Subtract the two like fractions:
720/1960 - 1225/1960 = 720 - 1225/1960 = -505/1960 - After reducing the fraction, the answer is -101/392
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/49-25/40 18/49-50/40 18/98-25/40 18/49-25/80 54/49-25/40 18/49-75/40 90/49-25/40