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Grade 5-7

Percent Applications, Part 1

by Raul Chiriboga | Math

3 Lessons 45:49
  1. 1. Mental Math and Percent Sense 15:02
  2. 2. Percentage of a Number 14:57
  3. 3. Finding the Rate and Original Number 15:50

Grade 5-7



Welcome to Gooroo Courses! This course, “Percent Applications-Part 1” will be taught by Raul. This course is all about math. In this chapter we will use patterns to compute mentally. Find percentageS, interests, and rates. Investigate discount, sales tax, commission, and better buy, and finally solve problems by writing an equation. We want to support all of our life long learners in educating themselves about a range of subjects. The purpose of this course is to unlock your potential and help you succeed in all of your goals. Come join us in learning all about percent applications and apply it to our real lives!

In this chapter we will use patterns to compute mentally. Find percentage, interest, and rate. Investigate discount, sales tax, commission, and better buy. Solve problems by writing an equation.


  • Arithmetic
  • Equations
  • Math
  • Patterns
  • Percent
  • STEM


NYU Tandon School of Engineering

Math/Chemistry Tutor – NYU Tandon School of Engineering:
Achieved higher student exam scores by developing weekly lesson plans for students. Motivated students by providing advice on the college process and engineering curriculum

I’ve been a Math and Chemistry tutor for four years for peers in my undergraduate studies, and a private tutor for middle schoolers. I enjoy teaching math and science from 6th grade and beyond. My courses offer a keen understanding in the fundamentals of a given topic.

I grew up and studied in New York City and graduated with a bachelor's degree in Chemical and Biomolecular Engineering from New York University in 2018, and I currently working as an Assistant Chemical Engineer for the City. My favorite part about tutoring is helping students find their passion and inspire self confidence in science and mathematics.

I believe teaching should be both fun and intellectually rewarding for both the student and tutor. With this in mind, I aim to achieve comfort and confidence in my students when learning about fundamental principles in math and science.

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