Subtract 28/50 from 10/40
10/40 - 28/50 is -31/100.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 50 is 200
Next, find the equivalent fraction of both fractional numbers with denominator 200 - For the 1st fraction, since 40 × 5 = 200,
10/40 = 10 × 5/40 × 5 = 50/200 - Likewise, for the 2nd fraction, since 50 × 4 = 200,
28/50 = 28 × 4/50 × 4 = 112/200 - Subtract the two like fractions:
50/200 - 112/200 = 50 - 112/200 = -62/200 - After reducing the fraction, the answer is -31/100
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/40-28/50 10/40-56/50 10/80-28/50 30/40-28/50 10/40-84/50 50/40-28/50 70/40-28/50