Subtract 20/40 from 8/50
8/50 - 20/40 is -17/50.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 40 is 200
Next, find the equivalent fraction of both fractional numbers with denominator 200 - For the 1st fraction, since 50 × 4 = 200,
8/50 = 8 × 4/50 × 4 = 32/200 - Likewise, for the 2nd fraction, since 40 × 5 = 200,
20/40 = 20 × 5/40 × 5 = 100/200 - Subtract the two like fractions:
32/200 - 100/200 = 32 - 100/200 = -68/200 - After reducing the fraction, the answer is -17/50
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/50-20/40 8/50-20/80 24/50-20/40 8/50-60/40 40/50-20/40 56/50-20/40