Add 42/54 and 56/90
42/54 + 56/90 is 7/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 90 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 54 × 5 = 270,
42/54 = 42 × 5/54 × 5 = 210/270 - Likewise, for the 2nd fraction, since 90 × 3 = 270,
56/90 = 56 × 3/90 × 3 = 168/270 - Add the two like fractions:
210/270 + 168/270 = 210 + 168/270 = 378/270 - 378/270 simplified gives 7/5
- So, 42/54 + 56/90 = 7/5
In mixed form: 12/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/54+56/90