Subtract 10/50 from 15/40
15/40 - 10/50 is 7/40.
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,
15/40 = 15 × 5/40 × 5 = 75/200 - Likewise, for the 2nd fraction, since 50 × 4 = 200,
10/50 = 10 × 4/50 × 4 = 40/200 - Subtract the two like fractions:
75/200 - 40/200 = 75 - 40/200 = 35/200 - After reducing the fraction, the answer is 7/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/40-10/50 15/40-20/50 15/80-10/50 45/40-10/50 15/40-30/50 75/40-10/50 15/40-70/50