Add 5/90 and 21/40
5/90 + 21/40 is 209/360.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 90 × 4 = 360,
5/90 = 5 × 4/90 × 4 = 20/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
21/40 = 21 × 9/40 × 9 = 189/360 - Add the two like fractions:
20/360 + 189/360 = 20 + 189/360 = 209/360 - So, 5/90 + 21/40 = 209/360
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/90+21/40 5/90+42/40 5/90+21/80 15/90+21/40 5/90+63/40 25/90+21/40 35/90+21/40