Solving Percent Word Problems with Proportions

This video tutorial introduces solving percent problems using proportions. It explains how to set up a proportion by placing the percent over 100 and equating it to the part over the whole. The tutorial provides several examples, demonstrating how to solve for different missing parts in percent problems using cross-multiplication. Each example is broken down step-by-step, highlighting the importance of identifying the percent, part, and whole in word problems.

What is the basic setup of the proportion formula for finding percents?

• Percent over 100 equals part over whole

• Whole over part equals percent over 100

• Percent over part equals whole over 100

• Part over whole equals 100 over percent

In the proportion formula, what does 'is' represent?

• The whole amount

• The part

• The total

• The percent

What is the first step in solving a percent problem using proportions?

• Set up the proportion with percent over 100 equals part over whole

• Multiply the numbers diagonally

• Add the numbers

• Divide the numbers

How do you solve for the missing part in a proportion?

• Subtract the smaller number from the larger number

• Add the numbers and divide by 100

• Multiply the numbers diagonally and divide by the other number

• Multiply all numbers together

If 25% of 124 is x, what is the value of x?

• 33

• 30

• 31

• 32

What is the missing part if 43% of 230 is n?

• 98.9

• 99.8

• 97.9

• 96.9

What percent of 250 is 138?

• 54.2%

• 57.2%

• 55.2%

• 56.2%

What is 80% of 20?

• 16

• 15

• 17

• 18

If 12.5% of 80 is x, what is the value of x?

• 10

• 9

• 11

• 12

14 is what percent of 15?

• 93.3%

• 92.3%

• 94.3%

• 95.3%