Add 28/54 and 30/40
28/54 + 30/40 is 137/108.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 40 is 1080
Next, find the equivalent fraction of both fractional numbers with denominator 1080 - For the 1st fraction, since 54 × 20 = 1080,
28/54 = 28 × 20/54 × 20 = 560/1080 - Likewise, for the 2nd fraction, since 40 × 27 = 1080,
30/40 = 30 × 27/40 × 27 = 810/1080 - Add the two like fractions:
560/1080 + 810/1080 = 560 + 810/1080 = 1370/1080 - 1370/1080 simplified gives 137/108
- So, 28/54 + 30/40 = 137/108
In mixed form: 129/108
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/54+30/40 28/54+60/40 28/54+30/80 84/54+30/40 28/54+90/40