Add 90/20 and 25/80
1st number: 4 10/20, 2nd number: 25/80
90/20 + 25/80 is 77/16.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 80 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 80 × 1 = 80,
25/80 = 25 × 1/80 × 1 = 25/80 - Add the two like fractions:
360/80 + 25/80 = 360 + 25/80 = 385/80 - 385/80 simplified gives 77/16
- So, 90/20 + 25/80 = 77/16
In mixed form: 413/16
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/20+50/80 90/40+25/80 90/20+75/80 90/60+25/80