Add 90/20 and 90/16
1st number: 4 10/20, 2nd number: 5 10/16
90/20 + 90/16 is 81/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 16 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 20 × 4 = 80,
90/20 = 90 × 4/20 × 4 = 360/80 - Likewise, for the 2nd fraction, since 16 × 5 = 80,
90/16 = 90 × 5/16 × 5 = 450/80 - Add the two like fractions:
360/80 + 450/80 = 360 + 450/80 = 810/80 - 810/80 simplified gives 81/8
- So, 90/20 + 90/16 = 81/8
In mixed form: 101/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/40+90/16 90/20+90/32 90/60+90/16 90/20+90/48 90/20+90/80