Subtract 28/40 from 3/49
3/49 - 28/40 is -313/490.
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,
3/49 = 3 × 40/49 × 40 = 120/1960 - Likewise, for the 2nd fraction, since 40 × 49 = 1960,
28/40 = 28 × 49/40 × 49 = 1372/1960 - Subtract the two like fractions:
120/1960 - 1372/1960 = 120 - 1372/1960 = -1252/1960 - After reducing the fraction, the answer is -313/490
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/49-28/40 3/49-56/40 3/98-28/40 3/49-28/80 9/49-28/40 3/49-84/40 15/49-28/40 21/49-28/40