Add 81/20 and 15/4
1st number: 4 1/20, 2nd number: 3 3/4
81/20 + 15/4 is 39/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 4 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 20 × 1 = 20,
81/20 = 81 × 1/20 × 1 = 81/20 - Likewise, for the 2nd fraction, since 4 × 5 = 20,
15/4 = 15 × 5/4 × 5 = 75/20 - Add the two like fractions:
81/20 + 75/20 = 81 + 75/20 = 156/20 - 156/20 simplified gives 39/5
- So, 81/20 + 15/4 = 39/5
In mixed form: 74/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/20+30/4 81/40+15/4 81/20+15/8 81/20+45/4 81/60+15/4 81/20+15/12 81/20+75/4 81/20+15/20 81/20+15/28