Add 8/40 and 21/80
8/40 + 21/80 is 37/80.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 40 × 2 = 80,
8/40 = 8 × 2/40 × 2 = 16/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
21/80 = 21 × 1/80 × 1 = 21/80 - Add the two like fractions:
16/80 + 21/80 = 16 + 21/80 = 37/80 - So, 8/40 + 21/80 = 37/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/40+21/80 8/40+42/80 8/80+21/80 24/40+21/80 8/40+63/80 56/40+21/80