Add 21/54 and 3/10
21/54 + 3/10 is 31/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 10 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 54 × 5 = 270,
21/54 = 21 × 5/54 × 5 = 105/270 - Likewise, for the 2nd fraction, since 10 × 27 = 270,
3/10 = 3 × 27/10 × 27 = 81/270 - Add the two like fractions:
105/270 + 81/270 = 105 + 81/270 = 186/270 - 186/270 simplified gives 31/45
- So, 21/54 + 3/10 = 31/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/54+3/10 21/54+6/10 21/54+3/20 63/54+3/10 21/54+9/10 21/54+3/30 21/54+15/10 21/54+3/50 21/54+21/10 21/54+3/70