What is a ratio? What is the rate definition? What’s the difference? And how do you work with rates? Click here to learn about ratios and rates in math!
Author Archive  Mike MᶜGarry

Mike served as a GMAT Expert at Magoosh, helping create hundreds of lesson videos and practice questions to help guide GMAT students to success. He was also featured as "member of the month" for over two years at GMAT Club. Mike holds an A.B. in Physics (graduating magna cum laude) and an M.T.S. in Religions of the World, both from Harvard. Beyond standardized testing, Mike has over 20 years of both private and public high school teaching experience specializing in math and physics. In his free time, Mike likes smashing foosballs into orbit, and despite having no obvious cranial deficiency, he insists on rooting for the NY Mets. Learn more about the GMAT through Mike's Youtube video explanations and resources like What is a Good GMAT Score? and the GMAT Diagnostic Test.
Ratio Math: Combining Ratios
If you need to brush up on your Ratio Math, you’re in the right place! Click here to learn all about combining ratios, and more.
Intro to Ratios
How much do you know about ratios? How much do you need to know? Click here to begin our video series that will help your understanding of this concept!
Percent Increase and Decrease: Sequential Percent Changes
When a percent increase and decrease is followed by yet another increase or decrease — you have sequential percent changes. Click here to learn more!
Simple and Compound Interest
Are you crystal clear on the concepts of simple and compound interest? If not, or if you need a brush up, check out this video that explains if for you!
Percent Decreases
Finding a percent increase vs. a percent decrease is the question. We have the answer! Click her to find out more about how to find a percent decrease.
Percent Increases
How do you find a percent increase of a certain number? Click here to learn more about using multipliers to find percent increases.
Number Sense and Percents
What is number sense and do you have it? How does this relate to percents? We’ll explore this and other questions in the below video. After you’ve mastered this, be sure to check out our other informative math videos! Number Sense Defined Number sense is intuition for numbers and the patterns of arithmetic. It cannot […]
Working with Percents: Percents to Decimals
How do you turn percents to decimals so that they can be more easily used in your math equations? Or how do you make a percent into a fraction? This video lesson will teach you these fundamentals of working with percents. And once you have this lesson down, check out our other video lessons on […]
Percents and Ratios: Introduction to Percents
What is a percent? Well fundamentally, it is a fraction. This video lesson will give you a thorough introduction to percents!