Solving Percent Problems with Equivalent Ratios

The video tutorial explains how to solve percent problems using equivalent ratios. It covers three main types of problems: finding the part, the whole, and the percent. The tutorial emphasizes starting with known information and using equivalent ratios to find unknown values. Examples include calculating the number of students visiting a science center, determining the total number of dogs in a park, and finding the percentage of students preferring vanilla ice cream.

What is the key concept to remember when solving percent problems using equivalent ratios?

• Always use variables.

• Only work with numbers.

• Use letters to represent unknowns.

• Ignore the given information.

If 30% of 500 students visited the science center, how many students is that?

• 200

• 150

• 250

• 100

What is the first step when you do not know the part in a percent problem?

• Start with the whole over the part.

• Start with the percent over 100.

• Start with the part over the percent.

• Start with the part over the whole.

If 15% of dogs at the park are poodles and there are 12 poodles, how many dogs are there in total?

• 70

• 60

• 90

• 80

What is the first step when you do not know the whole in a percent problem?

• Start with the part over the percent.

• Start with the whole over the part.

• Start with the percent over 100.

• Start with the part over the whole.

If 25 out of 40 students prefer vanilla ice cream, what percent of students is that?

• 60%

• 62.5%

• 55%

• 50%

What is the first step when you do not know the percent in a percent problem?

• Start with the part over the whole.

• Start with the percent over 100.

• Start with the whole over the part.

• Start with the part over the percent.

Which of the following is NOT a type of problem that can be solved using equivalent ratios?

• Finding the part

• Finding the variable

• Finding the percent

• Finding the whole

What should you always begin with when solving percent problems using equivalent ratios?

• A variable

• A random number

• What you know

• What you do not know

What is the 'giant one' used for in solving percent problems?

• To multiply or divide ratios

• To find variables

• To subtract numbers

• To add numbers