Ratios
What is a proportion?
an equation that states two ratios are equal.
Write this percent as a decimal. 18%
.18
What is 25% of 80?
20
Solve this proportion.
4/5 = x/10
x= 8
Write this percent as a decimal. 73%
.73
What is 15% of 200?
30
Simplify the ratio - 12:18
2:3
Solve this proportion.
3/8 = x/32
x= 12
Write this percent as a decimal. 105%
.105
What is 6% of 20?
1.2
Simplify the ratio - 35:50
7:10
In a classroom, there are 5 teachers for every 60 students. If the school enrolls 180 students, how many teachers will be needed to maintain the same ratio?
x= 15
Write this percent as a decimal. 5%
.05
A jacket costs $80, and it is on sale for 25% off. How much is the discount?
The discount is $20
A painter can paint 240 square feet of fence in 4 hours. How many square feet can they paint in 10 hours at the same rate?
x= 600
Write this percent as a decimal. 7.3%
.073%
A pair of shoes costs $120. The sales tax is 8%. How much is the tax?
The tax is $9.60