Subtract 45/40 from 28/49
1st number: 28/49, 2nd number: 1 5/40
28/49 - 45/40 is -31/56.
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,
28/49 = 28 × 40/49 × 40 = 1120/1960 - Likewise, for the 2nd fraction, since 40 × 49 = 1960,
45/40 = 45 × 49/40 × 49 = 2205/1960 - Subtract the two like fractions:
1120/1960 - 2205/1960 = 1120 - 2205/1960 = -1085/1960 - After reducing the fraction, the answer is -31/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/49-45/40 28/49-90/40 28/98-45/40 28/49-45/80 84/49-45/40