Add 42/90 and 27/54
42/90 + 27/54 is 29/30.
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,
42/90 = 42 × 3/90 × 3 = 126/270 - Likewise, for the 2nd fraction, since 54 × 5 = 270,
27/54 = 27 × 5/54 × 5 = 135/270 - Add the two like fractions:
126/270 + 135/270 = 126 + 135/270 = 261/270 - 261/270 simplified gives 29/30
- So, 42/90 + 27/54 = 29/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/90+27/54 42/90+81/54