Add 15/54 and 20/30
15/54 + 20/30 is 17/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 30 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 54 × 5 = 270,
15/54 = 15 × 5/54 × 5 = 75/270 - Likewise, for the 2nd fraction, since 30 × 9 = 270,
20/30 = 20 × 9/30 × 9 = 180/270 - Add the two like fractions:
75/270 + 180/270 = 75 + 180/270 = 255/270 - 255/270 simplified gives 17/18
- So, 15/54 + 20/30 = 17/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/54+20/30 15/54+40/30 15/54+20/60 45/54+20/30 15/54+60/30 15/54+20/90 75/54+20/30