Last year, 25 students signed up for a summer trip to California. This summer, 18 students have signed up to go. What is the percent decrease in the number of students?
STEPS:
1. Follow the following formula.
amount of change/original amount = x/100
2. Cross multiply the ratios
3. Solve for x by dividing each side by the coefficient.
O 40% decrease
O 56% decrease
O 28% decrease
O 21% decrease