Add 4/15 and 21/54
4/15 + 21/54 is 59/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 54 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 15 × 18 = 270,
4/15 = 4 × 18/15 × 18 = 72/270 - Likewise, for the 2nd fraction, since 54 × 5 = 270,
21/54 = 21 × 5/54 × 5 = 105/270 - Add the two like fractions:
72/270 + 105/270 = 72 + 105/270 = 177/270 - 177/270 simplified gives 59/90
- So, 4/15 + 21/54 = 59/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/15+21/54 4/15+42/54 4/30+21/54 12/15+21/54 4/15+63/54 4/45+21/54 20/15+21/54 4/75+21/54 28/15+21/54