Chapter 6 - Percent Proportion Setup

What is 75% of 120?

• $\frac{75}{100}=\frac{x}{120}$

• $\frac{75}{120}=\frac{x}{100}$

• $\frac{100}{120}=\frac{x}{75}$

Tags

CCSS.6.RP.A.3C

There are 48 walls in your house that need painted either blue or red. 17 of the walls are being painted blue. Identify the proportion that would help us find the percentage of rooms that need painted red.

• $\frac{17}{48}=\frac{x}{100}$

• $\frac{31}{48}=\frac{x}{100}$

• $\frac{31}{100}=\frac{17}{x}$

• $\frac{48}{17}=\frac{x}{100}$

Hampton Middle School has a number of classrooms that need new desks. Dr. Lux counted 13 rooms that needs new desks, and estimates that number is approximately 30% of the classrooms in the school. Choose the best proportion that we could use to determine the total number of classrooms in the school.

•  $\frac{30}{13}=\frac{x}{100}$  

•  $\frac{13}{x}=\frac{30}{100}$  

•  $\frac{13}{30}=\frac{x}{100}$  

Tags

CCSS.7.RP.A.2C

You earn $9.00 per hour of work. You tell your boss you want a raise to 130% of your current pay rate. Choose the proportion that could best help you determine your new pay rate.

• $\frac{9.00}{x}=\frac{130}{100}$

• $\frac{x}{9.00}=\frac{130}{100}$

• $\frac{x}{9.00}=\frac{30}{100}$

• $\frac{9.00}{x}=\frac{30}{100}$

Tags

CCSS.6.RP.A.3C

Crush is surfing off the coast of Hawaii. He surfed 20 waves, and crashed 3 times. Which proportion could we use to determine the percentage of times that Crush successfully rode a wave?

•  $\frac{17}{20}=\frac{x}{100}$  

•  $\frac{3}{20}=\frac{x}{100}$  

•  $\frac{x}{20}=\frac{3}{100}$  

•  $\frac{x}{20}=\frac{17}{100}$  

Tags

CCSS.6.RP.A.3C