Subtract 2/8 from 21/80
21/80 - 2/8 is 1/80.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 8 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 80 × 1 = 80,
21/80 = 21 × 1/80 × 1 = 21/80 - Likewise, for the 2nd fraction, since 8 × 10 = 80,
2/8 = 2 × 10/8 × 10 = 20/80 - Subtract the two like fractions:
21/80 - 20/80 = 21 - 20/80 = 1/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/80-2/8 21/80-4/8 21/80-2/16 63/80-2/8 21/80-6/8 21/80-2/24 21/80-10/8 21/80-2/40 21/80-14/8 21/80-2/56