Add 3/5 and 21/54
3/5 + 21/54 is 89/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 54 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 5 × 54 = 270,
3/5 = 3 × 54/5 × 54 = 162/270 - Likewise, for the 2nd fraction, since 54 × 5 = 270,
21/54 = 21 × 5/54 × 5 = 105/270 - Add the two like fractions:
162/270 + 105/270 = 162 + 105/270 = 267/270 - 267/270 simplified gives 89/90
- So, 3/5 + 21/54 = 89/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/5+21/54 3/5+42/54 3/10+21/54 9/5+21/54 3/5+63/54 3/15+21/54 15/5+21/54 3/25+21/54 21/5+21/54 3/35+21/54