Lois got 27 problems right on a math test. If this is 90% of the test, how many problems were on the test?

0.9x = 27

x = 27/0.9

x = ?

Thanks :D i knew it was 30, just wasn't sure how to get to the answer :D

You're welcome.

:-)

Is it 300

To find out how many problems were on the test, we can use the concept of proportions. Here's how to solve the problem step by step:

Step 1: Set up a proportion
Let's say "x" represents the total number of problems on the test. We know that Lois got 27 problems right, which is 90% of the test. The proportion can be set up as:
27 / x = 90 / 100

Step 2: Cross-multiply and solve for x
Cross-multiplying gives us:
27 * 100 = x * 90

Step 3: Solve for x
Now, simplify the equation:
2700 = 90x

Divide both sides by 90:
2700 / 90 = x
30 = x

Therefore, there were 30 problems on the math test.