Calculate the avg. number of Add to Carts needed for a sale to optimize revenue from the PickyStory app. Follow the formula below to calculate the avg. number of Add to Carts needed for a sale in the PickyStory app:

Divide the total number of Add to Carts (from PickyStory only) by the total number of Purchases (from PickyStory only).

**How to calculate the avg. number of Add to Carts needed for a sale in the PickyStory app**

### General formula

### Example

### Assumptions

- Total number of Add to Carts - 4352
- Total number of Purchases - 537