Add 45/80 and 15/4
1st number: 45/80, 2nd number: 3 3/4
45/80 + 15/4 is 69/16.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 4 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 80 × 1 = 80,
45/80 = 45 × 1/80 × 1 = 45/80 - Likewise, for the 2nd fraction, since 4 × 20 = 80,
15/4 = 15 × 20/4 × 20 = 300/80 - Add the two like fractions:
45/80 + 300/80 = 45 + 300/80 = 345/80 - 345/80 simplified gives 69/16
- So, 45/80 + 15/4 = 69/16
In mixed form: 45/16
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/80+15/4 45/80+30/4 45/80+15/8 45/80+45/4 45/80+15/12 45/80+75/4 45/80+15/20 45/80+15/28