Using proportions to find the value given a certain percentage, 120% of what is 90?

The video tutorial explains how to solve a percentage problem where 120% of an unknown value equals 90. It begins by discussing the concept of percentages as a part over a whole, then sets up the equation to find the unknown value. The solution involves using cross multiplication and verifying the result by converting percentages to decimals. The tutorial concludes by emphasizing the importance of creating proportions in percentage problems.

What does 100% represent in the context of percentages?

• A part

• A whole

• A fraction

• A decimal

In the problem '120% of what is 90', what does the number 90 represent?

• The part

• The unknown

• The whole

• The percentage

How do you express 120% as a decimal?

• 1.2

• 0.12

• 12

• 0.012

What is the first step in solving the equation 120% of X = 90?

• Convert 120% to a decimal

• Multiply 90 by 120

• Divide 90 by 120

• Add 120 to 90

What is the purpose of creating a proportion in percentage problems?

• To find the percentage

• To verify the solution

• To compare parts and wholes

• To simplify the equation