Add 15/2 and 20/80
1st number: 7 1/2, 2nd number: 20/80
15/2 + 20/80 is 31/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 2 × 40 = 80,
15/2 = 15 × 40/2 × 40 = 600/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
20/80 = 20 × 1/80 × 1 = 20/80 - Add the two like fractions:
600/80 + 20/80 = 600 + 20/80 = 620/80 - 620/80 simplified gives 31/4
- So, 15/2 + 20/80 = 31/4
In mixed form: 73/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/2+20/80 15/2+40/80 15/4+20/80 45/2+20/80 15/2+60/80 15/6+20/80 75/2+20/80 15/10+20/80 15/14+20/80