Add 21/90 and 7/16
21/90 + 7/16 is 161/240.
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,
7/16 = 7 × 45/16 × 45 = 315/720 - Add the two like fractions:
168/720 + 315/720 = 168 + 315/720 = 483/720 - 483/720 simplified gives 161/240
- So, 21/90 + 7/16 = 161/240
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/90+7/16 21/90+14/16 21/90+7/32 63/90+7/16 21/90+21/16 21/90+7/48 21/90+35/16 21/90+7/80 21/90+49/16