Add 90/16 and 21/5
1st number: 5 10/16, 2nd number: 4 1/5
90/16 + 21/5 is 393/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 5 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 16 × 5 = 80,
90/16 = 90 × 5/16 × 5 = 450/80 - Likewise, for the 2nd fraction, since 5 × 16 = 80,
21/5 = 21 × 16/5 × 16 = 336/80 - Add the two like fractions:
450/80 + 336/80 = 450 + 336/80 = 786/80 - 786/80 simplified gives 393/40
- So, 90/16 + 21/5 = 393/40
In mixed form: 933/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/16+42/5 90/32+21/5 90/16+21/10 90/16+63/5 90/48+21/5 90/16+21/15 90/80+21/5 90/16+21/25 90/16+21/35