Question

In Mr. Cannon's class, 36% scored an 80 or above on the semester exam. Which of the following is NOT equivalent to 36%?
A. 18/50


B. 0.36


C. 9/20


D. 9/25

Answer 1

To determine which option is NOT equivalent to 36%, we need to convert 36% into a fraction and a decimal, then compare it to the given options.

1. **As a fraction**:
36% can be expressed as:
\[
36\% = \frac{36}{100}
\]
This fraction can be simplified by dividing both the numerator and the denominator by 4:
\[
\frac{36 \div 4}{100 \div 4} = \frac{9}{25}
\]

2. **As a decimal**:
\[
36\% = 0.36
\]

Now we can check each option:

A. **18/50**:
Simplifying \( \frac{18}{50} \):
\[
\frac{18 \div 2}{50 \div 2} = \frac{9}{25}
\]
This is equivalent to 36%.

B. **0.36**:
This is in decimal form directly equivalent to 36%.

C. **9/20**:
Converting \( \frac{9}{20} \) to a decimal:
\[
9 \div 20 = 0.45
\]
This is NOT equivalent to 36%.

D. **9/25**:
We already established that \( \frac{9}{25} \) is equivalent to 36%.

Thus, the option which is NOT equivalent to 36% is:

**C. 9/20**