ACT · Mathematics

Percentages and percent change

35 practice questions, each with the answer and an explanation.

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Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.

All 35 questions

What is $15%$ of $400$ ?
What is $40%$ of $600$ ?
What is $15%$ of $40$ ?
What is $75%$ of $160$ ?
What is $40%$ of $120$ ?
What is $60%$ of $200$ ?
A quantity decreases from $80$ to $72$ . By what percent did it decrease?
A quantity increases from $120$ to $168$ . By what percent did it increase?
A quantity decreases from $120$ to $84$ . By what percent did it decrease?
A quantity increases from $50$ to $55$ . By what percent did it increase?
A quantity decreases from $40$ to $30$ . By what percent did it decrease?
A quantity decreases from $20$ to $15$ . By what percent did it decrease?
What is $60%$ of $40$ ?
What is $60%$ of $120$ ?
What is $60%$ of $60$ ?
What is $5%$ of $40$ ?
What is $75%$ of $60$ ?
A quantity increases from $120$ to $180$ . By what percent did it increase?
A quantity increases from $50$ to $75$ . By what percent did it increase?
A quantity decreases from $50$ to $35$ . By what percent did it decrease?
A quantity increases from $200$ to $300$ . By what percent did it increase?
A quantity increases from $20$ to $30$ . By what percent did it increase?
What is $5%$ of $400$ ?
What is $10%$ of $60$ ?
What is $20%$ of $600$ ?
What is $75%$ of $240$ ?
What is $60%$ of $240$ ?
A quantity decreases from $200$ to $100$ . By what percent did it decrease?
A store marks up the cost of an item by $60%$ to get the marked price, then sells it at $30%$ off the marked price. The selling price is what percent greater than the cost?
A town had $12, 000$ residents. Its population falls by $10%$ each year. About how many residents does it have after $3$ years?
What is $40%$ of $240$ ?
A price is increased by $20%$ , then decreased by $25%$ , and then increased by $10%$ . What is the net percent change from the original price?
How many liters of a $30%$ acid solution must be added to $10$ liters of a $60%$ acid solution to produce a $50%$ acid solution?
A store marks up an item's cost by $40%$ , then sells it at $25%$ off the marked price. What percent of the cost is the store's profit?
A town's population of $80, 000$ decreases by $10%$ each year. Which is closest to its population after $3$ years?

Percentages and percent change

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