Answer:
The ratio for online sales to shop sales. is 3:1.
Explanation:
Given:
- Total number of necklaces sold: 240
- Number of necklaces sold online: 180
Now,



The ratio of online sales to shop sales can be expressed in fractions as:

Substituting value

Simplify the fraction by dividing both parts by their greatest common divisor, which is 60:

Therefore, the ratio of online sales to shop sales is 3:1,