Add 28/54 and 63/80
28/54 + 63/80 is 2821/2160.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 80 is 2160
Next, find the equivalent fraction of both fractional numbers with denominator 2160 - For the 1st fraction, since 54 × 40 = 2160,
28/54 = 28 × 40/54 × 40 = 1120/2160 - Likewise, for the 2nd fraction, since 80 × 27 = 2160,
63/80 = 63 × 27/80 × 27 = 1701/2160 - Add the two like fractions:
1120/2160 + 1701/2160 = 1120 + 1701/2160 = 2821/2160 - So, 28/54 + 63/80 = 2821/2160
In mixed form: 1661/2160
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/54+63/80 84/54+63/80