Percent of a Number: Key Concepts and Practice

This video tutorial covers how to find the percent of a number using both fractions and decimals. It explains the conversion of percents to fractions and decimals, and provides example problems to illustrate both methods. The tutorial also addresses advanced calculations involving percents greater than 100% and less than 1%, offering a choice of methods based on ease of use.

What is the first step in converting a percentage to a fraction?

• Write the percentage over 100

• Reduce the fraction

• Multiply by 100

• Divide by 100

How do you convert a percentage to a decimal?

• Subtract 100

• Divide by 100

• Multiply by 100

• Add a decimal point

If 15% of students choose cheese, how many students is that out of 300?

• 60 students

• 55 students

• 50 students

• 45 students

What is the decimal equivalent of 18%?

• 1.8

• 0.018

• 18

• 0.18

What fraction represents 18%?

• 1/5

• 18/10

• 18/100

• 1/18

How many students have no snack if 12% of students opt out?

• 36 students

• 30 students

• 45 students

• 40 students

What is 145% of 320 using the fraction method?

• 470

• 464

• 480

• 450

Using the decimal method, what is 220% of 65?

• 150

• 130

• 143

• 160

What is the result of 0.25% of 58?

• 14.5

• 1.45

• 0.0145

• 0.145

What is the correct calculation for finding 128% of 550 using the decimal method?

• 704

• 750

• 720

• 680