Tax, Tip, Discount
Original Amount
Percent of Change
Commission and Simple Interest
Basic Percent Problems
100

An item is $10.00, and has a 20% discount. How much is it now? 

What is $8.00?

100
An item is worth $10.00 after a 50% discount. What is the original price of the item?

What is $20?

100

What is the percent of change formula?

What is amount of change / original amount * 100?

100

What is the formula for simple interest?

What is I=prt?

100

What is 30% of 84?

What is 25.2?

200

My meal was $45.30. I paid a 20% tip. How much did I pay in tip? 

What is $9.06?

200

There are currently 120 candies in a jar. This is 20% more than the number of candies in the jar last week. How many were in the jar last week?

What is 100?

200

I had 42 views on my TikTok video at 7pm. An hour later, there were 65 views. What is the percent of change in the number of views? Round to the nearest percent.

What is 55%?

200

What do I, p, r, and t stand for in the simple interest formula?

What is I=interest, p=principal, r=rate of interest, t=time?

200

There are 30 team members. 12 are wearing a red jersey. What percent of the members are wearing a red jersey?

What is 40%?

300
I bought a laptop for $299.95. There was a 6.5% sales tax. How much was the laptop in total? Round to the nearest cent.

What is $319.45?

300

I spent $18.50 including a 5% sales tax on a phone case. How much was the phone case before the sales tax? Round to the nearest cent.

What is $17.62?

300

I had 18 chicken nuggets in the afternoon and 11 in the evening. What is the percent of decrease in the number of chicken nuggets I had? Round to the nearest percent.

What is 39%?

300

I receive a 10% commission of my sales. My sales were $3,000 this month. How much do I earn in commission this month?

What is $300?

300

Out of a 12 month period, 9 months were virtual learning. What percent of the year was in person (non virtual) learning? 

What is 25%?

400

I spent $4.25 on a burger, $2.85 on fries, and $3.10 on a drink. There was a 4.5% sales tax. How much did I pay in total? Round to the nearest cent. 

What is $10.66?

400

I spent $56.73 in total including an 18% tip at the restaurant. What was the cost of my meal before the tip was applied? Round to the nearest cent.

What is $48.08?

400

I bought a chair for $22.23 using a coupon. It is supposed to be $31.75. What percent coupon did I use? Round to the nearest percent. 

What is 30%?

400

My base salary is $3,500. I earn a 5% commission on my sales, which were $1,860 this month. What is my total earnings this month?

What is $3,593?

400

I scored a 96% on a 50-question quiz. How many questions did I answer correctly?

What is 48?

500

For a party with three other friends, I got ice cream for $7.60, a bag of chips for $2.45, and a large pizza for $11.50. I received a 15% discount. If my friends and I are paying the same amount, how much is each person paying after the discount is applied? Round to the nearest cent.

What is $4.58?

500

There are currently 450 coins in the piggy bank. This is 70% less than the number of coins last week. How many coins were in the piggy bank last week? 

What is 1,500?

500

I had 50 pencils in October, 35 pencils in November, and 40 pencils in December. Find the difference in the percent of change from October to November and the percent of change from December to October. 

What is 5%?
500

I borrowed $25,000 in student loans that has a simple interest rate of 3.5% every year for 6 years. How much do I need to pay altogether after the 6 years?

What is $30,250?

500

I wrote 32 letters to friends so far. This is 40% of the letters I intend to write. How many letters am I writing in total?

What is 80?