Add 42/9 and 21/80
1st number: 4 6/9, 2nd number: 21/80
42/9 + 21/80 is 1183/240.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 9 × 80 = 720,
42/9 = 42 × 80/9 × 80 = 3360/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
21/80 = 21 × 9/80 × 9 = 189/720 - Add the two like fractions:
3360/720 + 189/720 = 3360 + 189/720 = 3549/720 - 3549/720 simplified gives 1183/240
- So, 42/9 + 21/80 = 1183/240
In mixed form: 4223/240
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/9+21/80 42/9+42/80 42/18+21/80 42/9+63/80 42/27+21/80 42/45+21/80 42/63+21/80