Martin was given 10 math problems, and he has answered 7 of them. What percent of the problems does Martin have left to do?
Responses
3%
7%
30%
70%
30%
To determine the percent of math problems Martin has left to do, we need to calculate the percentage of problems he already answered and subtract that from 100%.
First, let's calculate the percentage of problems Martin has already answered. Martin has answered 7 out of 10 problems, so we can calculate this as follows:
Percentage of problems answered = (number of problems answered / total number of problems) * 100
= (7 / 10) * 100
Percent of problems answered = 70%
Next, to find the percent of problems Martin has left to do, we subtract the percentage of problems answered from 100:
Percent of problems left = 100% - 70%
Therefore, Martin has 30% of the math problems left to do.
Hence, the correct response is: 30%
To find the percentage of problems that Martin has left to do, we need to calculate the ratio of the problems he has yet to answer to the total number of problems.
First, we need to find the number of problems Martin has left to do. To do this, subtract the number of problems he has already answered (7) from the total number of problems given (10).
10 - 7 = 3
So, Martin has 3 problems left to do.
Now, we can calculate the percentage. To do this, divide the number of problems left (3) by the total number of problems (10) and multiply the result by 100.
(3 / 10) * 100 = 30
Therefore, Martin has 30% of the problems left to do.