The equation 0.3x = 7 translates to the problem "What number is 30% of 7?"
This can be understood as follows:
- 0.3 represents 30% (as a decimal),
- x is the unknown number we are trying to find,
- and 7 is the value we are taking 30% of.
So, the correct answer is: What number is 30% of 7?