What is 12 is what percent of 30?

To find out what percent 12 is of 30, we can use the formula:

(percent) x (whole) = (part)

We know that the whole is 30, and the part is 12. We want to find the percent.

(percent) x 30 = 12

To solve for percent, we can divide both sides of the equation by 30:

(percent) = 12 ÷ 30

Simplifying this fraction, we get:

(percent) = 0.4

To convert this to a percentage, we can multiply by 100:

(percent) = 0.4 × 100 = 40%

Therefore, 12 is 40% of 30.