Add 1/90 and 21/10
1st number: 1/90, 2nd number: 2 1/10
1/90 + 21/10 is 19/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 10 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
1/90 = 1 × 1/90 × 1 = 1/90 - Likewise, for the 2nd fraction, since 10 × 9 = 90,
21/10 = 21 × 9/10 × 9 = 189/90 - Add the two like fractions:
1/90 + 189/90 = 1 + 189/90 = 190/90 - 190/90 simplified gives 19/9
- So, 1/90 + 21/10 = 19/9
In mixed form: 21/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/90+21/10 1/90+42/10 1/90+21/20 3/90+21/10 1/90+63/10 1/90+21/30 5/90+21/10 1/90+21/50 7/90+21/10 1/90+21/70