How Do You Figure Out a Percent of Change?

How Do You Figure Out a Percent of Change?

Note:

Word problems allow you to see the real world uses of math! In this tutorial, learn how to calculate the percent of increase using the percent of change formula.

Keywords:

  • problem
  • word problem
  • word
  • translate
  • translate words to algebra
  • percent change
  • percent
  • change
  • proportion
  • percent proportion
  • ratio
  • solve
  • equation
  • fraction
  • cross multiply
  • means extremes

Background Tutorials

  • Find a percent of a quantity as a rate per 100 (e.g., 30% of a quantity means 30/100 times the quantity); solve problems involving finding the whole, given a part and the percent.

      • What's a Percent?What's a Percent?

      What's a Percent?

      Sales tax, tips at restaurants, grades on tests... no matter what you do, you can't run away from percents. So watch this tutorial and see once and for all what percents are all about!

  • Understand the absolute value of a rational number as its distance from 0 on the number line; interpret absolute value as magnitude for a positive or negative quantity in a real-world situation.

      • What Does Absolute Value Mean?What Does Absolute Value Mean?

      What Does Absolute Value Mean?

      In this tutorial you'll see how you can think of absolute value in a very intuitive way. Let us know if you have any questions about it!

  • Evaluate expressions at specific values of their variables. Include expressions that arise from formulas used in real-world problems. Perform arithmetic operations, including those involving whole-number exponents, in the conventional order when there are no parentheses to specify a particular order (Order of Operations).

      • What is a Variable?What is a Variable?

      What is a Variable?

      You can't do algebra without working with variables, but variables can be confusing. If you've ever wondered what variables are, then this tutorial is for you!

  • Use proportional relationships to solve multistep ratio and percent problems.

      • What's a Percent of Change?What's a Percent of Change?

      What's a Percent of Change?

      Lots of things in this world change their value such as cars, video games, and computers. When something either increases or decreases in value, it can be useful to know the percent of that change in value. To figure out that percent, you'll need the percent of change formula. Learn it with this tutorial!

      • How Do You Solve a Proportion Using Cross Products?How Do You Solve a Proportion Using Cross Products?

      How Do You Solve a Proportion Using Cross Products?

      Want to solve a percent proportion? Just use the means extremes property of proportions to cross multiply! Solve for the variable, and you have your answer! Learn how with this tutorial.

  • Give examples of linear equations in one variable with one solution, infinitely many solutions, or no solutions. Show which of these possibilities is the case by successively transforming the given equation into simpler forms, until an equivalent equation of the form x = a, a = a, or a = b results (where a and b are different numbers).

Further Exploration

  • Use proportional relationships to solve multistep ratio and percent problems.