Add 42/54 and 21/10
1st number: 42/54, 2nd number: 2 1/10
42/54 + 21/10 is 259/90.
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,
42/54 = 42 × 5/54 × 5 = 210/270 - Likewise, for the 2nd fraction, since 10 × 27 = 270,
21/10 = 21 × 27/10 × 27 = 567/270 - Add the two like fractions:
210/270 + 567/270 = 210 + 567/270 = 777/270 - 777/270 simplified gives 259/90
- So, 42/54 + 21/10 = 259/90
In mixed form: 279/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/54+21/10 42/54+42/10 42/54+21/20 42/54+63/10 42/54+21/30 42/54+21/50 42/54+21/70