Subtract 21/50 from 2/8
2/8 - 21/50 is -17/100.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 50 is 200
Next, find the equivalent fraction of both fractional numbers with denominator 200 - For the 1st fraction, since 8 × 25 = 200,
2/8 = 2 × 25/8 × 25 = 50/200 - Likewise, for the 2nd fraction, since 50 × 4 = 200,
21/50 = 21 × 4/50 × 4 = 84/200 - Subtract the two like fractions:
50/200 - 84/200 = 50 - 84/200 = -34/200 - After reducing the fraction, the answer is -17/100
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/8-21/50 2/8-42/50 2/16-21/50 6/8-21/50 2/8-63/50 2/24-21/50 10/8-21/50 2/40-21/50 14/8-21/50 2/56-21/50