Add 80/90 and 42/54
80/90 + 42/54 is 5/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 54 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 90 × 3 = 270,
80/90 = 80 × 3/90 × 3 = 240/270 - Likewise, for the 2nd fraction, since 54 × 5 = 270,
42/54 = 42 × 5/54 × 5 = 210/270 - Add the two like fractions:
240/270 + 210/270 = 240 + 210/270 = 450/270 - 450/270 simplified gives 5/3
- So, 80/90 + 42/54 = 5/3
In mixed form: 12/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/90+84/54