How do you find the click-through rate if you know the number of clicks and impressions?

The click-through rate (CTR) is a crucial metric in digital marketing that measures the effectiveness of an ad campaign by showing the percentage of impressions that resulted in clicks. To calculate CTR correctly, you divide the number of clicks by the number of impressions and then multiply by 100 to convert the result into a percentage.

Among the choices provided, the second option captures this essence, but with an additional multiplication by 1000 instead of 100. Typically, CTR is expressed as a percentage, so that additional factor of 10 may lead to confusion, although it can appear mathematically valid in some contexts; it is not standard.

The correct approach to find the click-through rate should follow this format:

1. Divide the number of clicks by the total impressions to find out what fraction of the impressions led to clicks.

2. Multiply that result by 100 to express it as a percentage.

Therefore, it's essential to note that while option B demonstrates a formula involving clicks and impressions, understanding the proper standard CTR formula is important for applying the metric effectively in digital marketing analyses. The other options also do not correctly represent the standard calculation for CTR.