Math Core

This test covers solving percent problems, percent increase and decrease, markups, discounts, tax and tips, simple interest, and percent error.

Question 1

What is $38\%$ of 150?

Enter a number. Fractions like 3/4 and sqrt(2) are OK.

Question 2

24 is $15\%$ of what number?

Enter a number. Fractions like 3/4 and sqrt(2) are OK.

Question 3

Tomás answered 34 of 40 quiz questions correctly. What percent did he get correct?

Enter a number. Fractions like 3/4 and sqrt(2) are OK.

Question 4

The number of students in the chess club went from 15 to 21. What is the percent increase?

Enter a number. Fractions like 3/4 and sqrt(2) are OK.

Question 5

A car's value decreased by $18\%$ this year. Which expression gives its value now if it was worth $v$ dollars at the start of the year?

Question 6

After a $25\%$ increase, a concert ticket costs $80. What was the original price, in dollars?

Enter a number. Fractions like 3/4 and sqrt(2) are OK.

Question 7

A store pays $28 for a water bottle and marks it up $50\%$ . What is the selling price, in dollars?

Enter a number. Fractions like 3/4 and sqrt(2) are OK.

Question 8

A dinner bill is $46.54. The family leaves a $17\%$ tip. What is the total with the tip, rounded to the nearest cent?

Enter a number. Fractions like 3/4 and sqrt(2) are OK.

Question 9

A pair of boots costs $60. They are $25\%$ off, and then $6\%$ sales tax is added to the sale price. What is the final cost, in dollars?

Enter a number. Fractions like 3/4 and sqrt(2) are OK.

Question 10

A $120 bike helmet goes on sale for $96. What is the percent discount?

Question 11

Find the simple interest on $1,500 at $4.5\%$ per year for 4 years, in dollars.

Enter a number. Fractions like 3/4 and sqrt(2) are OK.

Question 12

Rosa borrows $2,000 at $5\%$ simple interest per year for 18 months. What total amount does she pay back, in dollars?

Enter a number. Fractions like 3/4 and sqrt(2) are OK.

Question 13

A $4,000 deposit earns $420 in simple interest over 3 years. What is the yearly interest rate, as a percent?

Enter a number. Fractions like 3/4 and sqrt(2) are OK.

Question 14

Ella estimated a room is 17 feet wide. It is actually 20 feet wide. What is her percent error?

Enter a number. Fractions like 3/4 and sqrt(2) are OK.

Question 15

A car's speedometer reads 38 miles per hour when the car is actually going 36 miles per hour. What is the percent error, to the nearest tenth of a percent?

Enter a number. Fractions like 3/4 and sqrt(2) are OK.