Add 45/20 and 15/5
1st number: 2 5/20, 2nd number: 3 0/5
45/20 + 15/5 is 21/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 5 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 20 × 1 = 20,
45/20 = 45 × 1/20 × 1 = 45/20 - Likewise, for the 2nd fraction, since 5 × 4 = 20,
15/5 = 15 × 4/5 × 4 = 60/20 - Add the two like fractions:
45/20 + 60/20 = 45 + 60/20 = 105/20 - 105/20 simplified gives 21/4
- So, 45/20 + 15/5 = 21/4
In mixed form: 51/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/20+15/5 45/20+30/5 45/40+15/5 45/20+15/10 45/20+45/5 45/60+15/5 45/20+75/5 45/20+15/25 45/20+15/35