Add 15/40 and 15/54
15/40 + 15/54 is 47/72.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 54 is 1080
Next, find the equivalent fraction of both fractional numbers with denominator 1080 - For the 1st fraction, since 40 × 27 = 1080,
15/40 = 15 × 27/40 × 27 = 405/1080 - Likewise, for the 2nd fraction, since 54 × 20 = 1080,
15/54 = 15 × 20/54 × 20 = 300/1080 - Add the two like fractions:
405/1080 + 300/1080 = 405 + 300/1080 = 705/1080 - 705/1080 simplified gives 47/72
- So, 15/40 + 15/54 = 47/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/40+15/54 15/40+30/54 15/80+15/54 45/40+15/54 15/40+45/54 75/40+15/54 15/40+75/54