Add 3/2 and 21/80
1st number: 1 1/2, 2nd number: 21/80
3/2 + 21/80 is 141/80.
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,
3/2 = 3 × 40/2 × 40 = 120/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
21/80 = 21 × 1/80 × 1 = 21/80 - Add the two like fractions:
120/80 + 21/80 = 120 + 21/80 = 141/80 - So, 3/2 + 21/80 = 141/80
In mixed form: 161/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/2+21/80 3/2+42/80 3/4+21/80 9/2+21/80 3/2+63/80 3/6+21/80 15/2+21/80 3/10+21/80 21/2+21/80 3/14+21/80