Percentages

Did you know the study of Math involves primarily arriving at a solution step by step? This critical skill is essential in every walk of life. And our world class math tutors know that this is exactly what every student needs. Our tutoring is individual-oriented and therefore personalized to suit each student according to their skills and needs. The live online tutoring hour adopts a logical, step by step way of teaching. The best thing you can do for your child is to give them the eTutorWorld advantage and help them to not only master these valuable skills but also have the confidence required to succeed in grade school and beyond.

Learn  Percentages  from Certified Online Pre-Algebra Tutor

A percentage is a number or ratio expressed as a fraction of 100. It is often denoted using the percent sign, “%” .We use the percent symbol (%) to express percent.

How do you get percentage of a number?

• Multiply the number by the percent
• Divide the answer by 100 (Move decimal point two places to the left)
• Round to the desired precision

How do you get a percentage of an amount?

Let’s understand with an example:

1. Find 16% of $1600

Solution:

16% of $1600
= 16/100 × 1600
= $256

A percent is 1 part out of 100.
1% is equal to 1/100 or 0.01.

How do you solve percent problems using a proportion ?

The proportion method works for all three types of percent problems.

• What is 40% of 30?
• 25% of what number is 75?
• 5 is what percent of 4?

Let’s understand with an example:

1. What is 80% of 15?

The whole is 15.
The percent is 80%.

Let n represent the part.
Write a proportion to solve for n.

 =  = 

100n = 80 x 15  100n = 1200

n=12

80% of 15 is 12.