Carlos took a test and made a 50. On the next test, he made 75. What is the percentage of change between the two test scores? A. 150% increase
B. 150% decrease
C. 50% decrease
D. 50% increase

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers