SBI-Concept Percent of Change Flashcards
Percent of change: One quantity in the problem either increases or decreases by a certain
percentage.
A survey conducted at Northeast Middle School indicated that 40% of the seventh graders wanted to learn German as a foreign language. If 160 seventh-graders wanted to learn German, what is the total number of seventh-graders at Northeast Middle School?
A tree that was 10 feet tall grew by 5 feet. What percent has it grown?
A plant that used to be 12 inches tall has grown to 15 inches tall. How much did the plant grow (as a percent)?
Alan’s parents increased his weekly allowance by 10% from last year. If he was getting $20 a week last year, how much will he get per week this year?
Mariah and Alex both started exercising more and EACH lost 8 pounds. Before they started exercising, Mariah weighed 160 lbs. and Alex weighed 200 lbs. Who had the greater percent of decrease in weight, Mariah or Alex?
The library ordered 200 books last year. This year, they ordered 180 books. What is the percent of change from last year to this year in the number of books ordered?
