Add 3/40 and 28/54
3/40 + 28/54 is 641/1080.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 54 is 1080
Next, find the equivalent fraction of both fractional numbers with denominator 1080 - For the 1st fraction, since 40 × 27 = 1080,
3/40 = 3 × 27/40 × 27 = 81/1080 - Likewise, for the 2nd fraction, since 54 × 20 = 1080,
28/54 = 28 × 20/54 × 20 = 560/1080 - Add the two like fractions:
81/1080 + 560/1080 = 81 + 560/1080 = 641/1080 - So, 3/40 + 28/54 = 641/1080
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/40+28/54 3/40+56/54 3/80+28/54 9/40+28/54 3/40+84/54 15/40+28/54 21/40+28/54