Add 45/20 and 20/80
1st number: 2 5/20, 2nd number: 20/80
45/20 + 20/80 is 5/2.
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,
45/20 = 45 × 4/20 × 4 = 180/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
20/80 = 20 × 1/80 × 1 = 20/80 - Add the two like fractions:
180/80 + 20/80 = 180 + 20/80 = 200/80 - 200/80 simplified gives 5/2
- So, 45/20 + 20/80 = 5/2
In mixed form: 21/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/20+20/80 45/20+40/80 45/40+20/80 45/20+60/80 45/60+20/80