What will be the world population in 5 years if we assume that these rates of increase will stay constant for the next 5 years.

In previous lessons, you were shown how to convert a decimal to a percent and a percent to a decimal.

and we found the solution by substituting into a proportion.

But how would we solve this problem: 18 is 40% of what number? Identify: The phrase 18 is means that 18 is the part.

We could have used equivalent fractions instead (i.e., since 20 multiplied by 5 equals 100, we get that 8 multiplied by 5 equals x, so x equals 40).

In Problem 1 we were asked 8 is what percent of 20?

Analysis: In this problem, you are being asked 8 is what percent of 20?

You are given two numbers from the proportion above and asked to find the third.

One of their techniques is to argue for more benefits for "their" group, while claiming that "their" group shouldn't be blamed for the problem.

How can they do this, when they're using the same statistics each time?

## Comments How To Solve Percentages Problems

## How to Solve Word Problems That Use Percents -

Solve percent word problems by setting up fractions, converting percents to decimals and using variables To unlock this lesson you must be a Member. Create your account…

## Percent of" Word Problems Increase and Decrease

Demonstrates how to set up and solve 'increase-decrease' word problems. Discusses the difference between 'absolute' and 'relative' values, and how these values can be misused.…

## How to Solve percentage problems Math WonderHowTo

In the 13th lesson, learn how to solve SAT problems using the Official SAT Study Guide. Here are the math problems and their page numbers that this video covers p399 #15 p491 #13 p535 #16. Learn how to solve percentage problems and improve your SAT score by preparing with this math tutorial video.…

## How Do You Solve Percentages?

A percentage problem can ask for a fraction or decimal to be turned into a percentage, or it can ask for a percentage to be turned into a fraction or decimal. To solve the problem, first figure out what the problem is asking you to do.…

## Percent Word Problems

Percent Word Problems Handout Revised @2009 MLC page 3 of 8 Percent Word Problems Directions Set up a basic percent problem. Sometimes you will have to do extra steps to solve the problem. Follow rounding directions. Answers and solutions start on page 6. 1 A student earned a grade of 80% on a math test that had 20 problems.…

## Lesson 370 Using Equations to Solve Percent Problems

Not all folks like to use proportions for solving percent problems, and indeed there is another method. You can set up simple linear equations for many percent problems if you remember three little things The word "is" means equals in the the equation. The word "of" means times in the equation. The thing you are trying to find is the variable.…

## How to Do Percentages - Step by Step

How to Do Percentages If you are to calculate marks out of 100 it is usually not difficult so as to find the percentage. Nevertheless, if the marks you have obtained are not exactly out of 100 and you are calculating percentage, it may prove to be quite confusing and problematic for some students as well as for some elderly people.…

## Percent Maths Problems -

Percent math problems with detailed solutions. Problems that deal with percentage increase and decrease as well as problems of percent of quantities. Mixture problems involving percentages as well as percentage of areas are included.…