Percentage Calculations and Word Problems

This video tutorial covers benchmark percentages, including methods to find 50% of a number, solving percentage problems related to distances, mental calculation of percentages, and exploring Noah's method for finding 20% of a number. It also includes a comparison of different percentages of money and a distance problem involving Lynn and Andre.

What is a quick way to find 50% of a number?

• Add 10 to the number

• Divide the number by 2

• Multiply the number by 2

• Subtract 5 from the number

How do you find 50% of a number quickly?

• Multiply by 2

• Subtract 5

• Divide by 2

• Add 10

If Andre lives 1.6 kilometers from school, what is 50% of that distance?

• 0.8 kilometers

• 1.2 kilometers

• 1.6 kilometers

• 2.0 kilometers

What is 50% of a half mile?

• 1 mile

• 0.5 miles

• 0.75 miles

• 0.25 miles

What is 50% of 1.6 kilometers?

• 2.0 kilometers

• 0.8 kilometers

• 1.6 kilometers

• 1.2 kilometers

What is 50% of 0.5 miles?

• 0.75 miles

• 0.25 miles

• 0.5 miles

• 1 mile

If a laptop is on a 10% discount and you save $35, what was the original price?

• $350

• $300

• $385

• $315

What is the original price of a laptop if a 10% discount saves you $35?

• $350

• $300

• $385

• $315

If a laptop is on a 10% discount and you save $35, what was the original price?

• $350

• $300

• $315

• $385

How do you calculate 15 as a percentage of 30?

• 25%

• 50%

• 75%

• 100%