Question

On a biology test, a student got 25 questions correct but did not pass. On a second attempt, the student got 30 questions correct. What was the percent of increase?
A. 20%
B. 5%
C. 80%
D. 16.7%

Answer 1

Answer:

The answer to your question is the letter A.20%

Step-by-step explanation:

Data

Questions correct in the first attempt = 25

Questions correct in the second attempt = 30

Percent of increase = ?

Process

1.- Use proportions and cross multiplication to solve this problem. 25 questions is 100%.

                              25 questions -------------------- 100%

                               30 questions -------------------- x

                               x = (30 x 100)/25

                               x = 3000/25

                               x = 120 %

2.- Subtract 100 from 120%

Percent increase = 120 - 100

                             = 20%