Download presentation

Presentation is loading. Please wait.

Published bySabrina Wickett Modified over 9 years ago

1
Finding a Percent of a Number Two methods: 1.) Mental Math- (Only works for some percents) 2.) Multiplication method

2
Mental Math Finding Percents 50% Write 50% as a fraction in lowest terms. Find 50% of 150. Find 50% of 240. To find 50% divide by 2. Trick:

3
Mental Math Finding Percents 25% Write 25% as a fraction in lowest terms. Find 25% of 32. Find 25% of 240. To find 25% divide by 4. Trick:

4
Mental Math Finding Percents 20% Write 20% as a fraction in lowest terms. Find 20% of 40. Find 20% of 350. To find 20% divide by 5. Trick:

5
Mental Math Finding Percents 10% Write 10% as a fraction in lowest terms. Find 10% of 50. Find 25% of 240. To find 10% divide by 10. Find 10% of 356. Trick:

6
Mental Math Finding Percents 5% Write 5% as a fraction in lowest terms. Find 5% of 80. Find 25% of 240. To find 5% divide by 20. Find 5% of 120. Trick:

7
Mental Math Finding Percents 1% Write 1% as a fraction in lowest terms. Find 1% of 70. Find 25% of 240. To find 1% divide by 100. Find 1% of 125. Trick:

8
Mental Math Finding Percents 33 % Write 33.3% as a fraction in lowest terms. Find of 51. Find 25% of 240. To find 33.3% divide by 3. Find of 126. Trick:

9
Percent Short cut 50% 25 % 20% 10% 5% 1%

10
How could we find 15%? Fin d 15% of 60.Find 15% of 42 How could we find 75%? Fin d 75% of 400.Find 75% of 60

11
Hint- "of " means multiplication Method two: Multiplying decimals Convert the percent to a decimal and multiply 1.) Find 45% of 40 2.) Find 35% of 500 3.) What is 12% of 43? 4.) Find 80% of 35

12
Demonstrate Understanding: Find each percent, you may use either method. 1.) 20% of 952.) 52% of 96 3.) 15% of 824.) of 147 5.) 26% of 266.) 30% of 250 7.) There were 40 questions on the test, if Samantha got 80% correct, how many questions did she get right?

Similar presentations

© 2024 SlidePlayer.com Inc.

All rights reserved.

To make this website work, we log user data and share it with processors. To use this website, you must agree to our Privacy Policy, including cookie policy.

Ads by Google