Add 90/16 and 81/20
1st number: 5 10/16, 2nd number: 4 1/20
90/16 + 81/20 is 387/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 20 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 20 × 4 = 80,
81/20 = 81 × 4/20 × 4 = 324/80 - Add the two like fractions:
450/80 + 324/80 = 450 + 324/80 = 774/80 - 774/80 simplified gives 387/40
- So, 90/16 + 81/20 = 387/40
In mixed form: 927/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/32+81/20 90/16+81/40 90/48+81/20 90/16+81/60 90/80+81/20