Add 21/90 and 60/18
1st number: 21/90, 2nd number: 3 6/18
21/90 + 60/18 is 107/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
21/90 = 21 × 1/90 × 1 = 21/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
60/18 = 60 × 5/18 × 5 = 300/90 - Add the two like fractions:
21/90 + 300/90 = 21 + 300/90 = 321/90 - 321/90 simplified gives 107/30
- So, 21/90 + 60/18 = 107/30
In mixed form: 317/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/90+60/18 21/90+60/36 63/90+60/18 21/90+60/54 21/90+60/90