Mastering Percentage Calculations
Test your understanding of percentages in real-world applications and algebraic contexts
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Quiz Questions & Answers
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Question 1: If a price increases by 20% and then decreases by 20%, what is the final result?
4% more than original price
Same as original price
4% less than original price
No change in price
Question 2: In a solution of 80g, the concentration of salt is 15%. How many grams of salt are in the solution?
15g
12g
1.2g
8g
Question 3: What is the percentage increase if a value changes from 50 to 75?
150%
50%
25%
75%
Question 4: If you want to calculate 45% of a number quickly, which expression is equivalent?
(40% + 4%)
(50% - 5%)
(50% + 5%)
(40% + 15%)
Question 5: A solution contains 30% acid. How many mL of acid are in 250mL of solution?
25mL
75mL
175mL
83.3mL
Question 6: What is the percent decrease when a value drops from 80 to 60?
33.3%
25%
75%
20%
Question 7: To increase a quantity by 80%, you multiply it by:
0.8
0.08
80
1.8
Question 8: If 15 is 60% of a number, what is the number?
9
36
40
25