Add 21/90 and 35/16
1st number: 21/90, 2nd number: 2 3/16
21/90 + 35/16 is 581/240.
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,
35/16 = 35 × 45/16 × 45 = 1575/720 - Add the two like fractions:
168/720 + 1575/720 = 168 + 1575/720 = 1743/720 - 1743/720 simplified gives 581/240
- So, 21/90 + 35/16 = 581/240
In mixed form: 2101/240
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/90+35/16 21/90+70/16 21/90+35/32 63/90+35/16 21/90+35/48 21/90+35/80