Answer:
The answer to your question is the letter C.
Step-by-step explanation:
Data
Number of problems = 10
Problems answered = 7
Percent of problems do not answer = ?
Process
1.- Calculate the percent of problems answered
10 problems -------------------- 100 %
7 problems -------------------- x
x = (7 x 100) / 10
x = 700 / 10
x = 70 %
2.- Calculate the percent of problems left to do.
Problems left = 100 - 70
= 30%
