Add 21/90 and 6/16
21/90 + 6/16 is 73/120.
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,
6/16 = 6 × 45/16 × 45 = 270/720 - Add the two like fractions:
168/720 + 270/720 = 168 + 270/720 = 438/720 - 438/720 simplified gives 73/120
- So, 21/90 + 6/16 = 73/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/90+6/16 21/90+12/16 21/90+6/32 63/90+6/16 21/90+18/16 21/90+6/48 21/90+30/16 21/90+6/80 21/90+42/16