Add 3/40 and 45/80
3/40 + 45/80 is 51/80.
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,
3/40 = 3 × 2/40 × 2 = 6/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
45/80 = 45 × 1/80 × 1 = 45/80 - Add the two like fractions:
6/80 + 45/80 = 6 + 45/80 = 51/80 - So, 3/40 + 45/80 = 51/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/40+45/80 3/40+90/80 3/80+45/80 9/40+45/80 15/40+45/80 21/40+45/80