Add 21/90 and 4/18
21/90 + 4/18 is 41/90.
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,
4/18 = 4 × 5/18 × 5 = 20/90 - Add the two like fractions:
21/90 + 20/90 = 21 + 20/90 = 41/90 - So, 21/90 + 4/18 = 41/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/90+4/18 21/90+8/18 21/90+4/36 63/90+4/18 21/90+12/18 21/90+4/54 21/90+20/18 21/90+4/90 21/90+28/18