KS2 Primary Maths Age 13-17 - Ratio, Proportion and Algebra: Percentage Problems - Explained

The video tutorial explains how to calculate percentages using a step-by-step approach. It starts with finding 10% of a number, then calculates 1% by dividing the 10% value by 10. The tutorial proceeds to find 36% of a number by multiplying and adding the results. It also covers how to multiply decimals and concludes with adding the calculated percentages to get the final result.

What is the quick method to find 10% of a number?

• Divide the number by 10

• Multiply the number by 0.1

• Add 10 to the number

• Subtract 10 from the number

How do you calculate 1% of a number?

• Multiply the number by 0.01

• Divide the number by 100

• Find 1/10 of 10% of the number

• Add 1 to the number

What is the result of multiplying 45 by 3?

• 135

• 150

• 90

• 120

How do you handle decimal points when multiplying decimals?

• Ignore the decimal point

• Multiply as whole numbers and adjust the decimal point later

• Move the decimal point to the left

• Add a zero to the end of the number

What is the final result of adding 135 and 27?

• 170

• 162

• 160

• 150