Add 28/54 and 42/90
28/54 + 42/90 is 133/135.
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,
28/54 = 28 × 5/54 × 5 = 140/270 - Likewise, for the 2nd fraction, since 90 × 3 = 270,
42/90 = 42 × 3/90 × 3 = 126/270 - Add the two like fractions:
140/270 + 126/270 = 140 + 126/270 = 266/270 - 266/270 simplified gives 133/135
- So, 28/54 + 42/90 = 133/135
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/54+42/90 28/54+84/90 84/54+42/90