Add 21/90 and 9/16
21/90 + 9/16 is 191/240.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 16 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 90 × 8 = 720,
21/90 = 21 × 8/90 × 8 = 168/720 - Likewise, for the 2nd fraction, since 16 × 45 = 720,
9/16 = 9 × 45/16 × 45 = 405/720 - Add the two like fractions:
168/720 + 405/720 = 168 + 405/720 = 573/720 - 573/720 simplified gives 191/240
- So, 21/90 + 9/16 = 191/240
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/90+9/16 21/90+18/16 21/90+9/32 63/90+9/16 21/90+27/16 21/90+9/48 21/90+45/16 21/90+9/80 21/90+63/16