Add 2/45 and 80/21
1st number: 2/45, 2nd number: 3 17/21
2/45 + 80/21 is 1214/315.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 21 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 45 × 7 = 315,
2/45 = 2 × 7/45 × 7 = 14/315 - Likewise, for the 2nd fraction, since 21 × 15 = 315,
80/21 = 80 × 15/21 × 15 = 1200/315 - Add the two like fractions:
14/315 + 1200/315 = 14 + 1200/315 = 1214/315 - So, 2/45 + 80/21 = 1214/315
In mixed form: 3269/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/45+80/21 2/90+80/21 2/45+80/42 6/45+80/21 2/45+80/63 10/45+80/21 14/45+80/21