Percent & Proportions
This compares the difference between an estimate and the actual value to the actual value.
A: Percent error
A $39.99 game is 20% off. What is the discount amount?
7.99
What is the formula for simple interest?
I = Prt
The actual height is 50 inches. The estimate was 45 inches. What is the percent error? (nearest percent)
10%
You invest $500 at 5% simple interest for 3 years. How much interest do you earn?
75
Write the proportion for 30 strikeouts out of 90 at-bats.
30/90
The same game costs $39.99 and is 20% off. What is the sale price?
31.99
You earn $6.25 per day for 2 days on $1,000. How much interest total?
12.50
The actual value is 200. The estimate is 180. What is the percent error?
10%
A shirt costs $40. It is marked up 25%. What is the new price?
50
60% of 350 students like hip-hop. How many students is that?
210
Shoes sell for $192.61 with an 87% markup. What was the original price?
103
A loan earns $264 in 2 years at 6%. What was the principal?
2200
A student measured 98 cm, but the actual length was 100 cm. What is the percent error?
2%
45 is what percent of 60?
75%
220.2 meters is 60% of a mountain. How tall is the mountain?
367 meters
A meal costs $25.30 with 8% tax. What is the total?
27.32
A $600 loan earns $60 in 5 years. What is the annual interest rate?
2%
The actual cost was $80. Someone estimated $92. What is the percent error?
15%
How many siblings does Mr.Pohl Have
1
A kitten increases from 550 g to 1200 g. What is the percent increase (nearest percent)?
118%
Bill: 27.32
If the total bill was $32.24 after tip and tax, what percent tip was left (nearest percent)?
18%
If interest is $264, rate 6%, time 2 years, solve for P.
2200
A package should weigh 500 g but was recorded as 450 g. What is the percent error?
A: 10%
How many points is your test going to be worth?
16