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

The video tutorial explains how to calculate 45% of 460 without using a calculator. It begins by finding 10% of 460, which is 46, and then calculates 5% by halving the 10% value, resulting in 23. To find 45%, the tutorial combines four 10% values and one 5% value, leading to a final answer of 207. The tutorial emphasizes the importance of understanding percentage calculations and provides a step-by-step approach to solving such problems.

What is the first step in calculating 45% of 460 without a calculator?

• Find 1% of 460

• Find 5% of 460

• Find 10% of 460

• Find 50% of 460

How do you calculate 5% of a number if you know 10% of it?

• Subtract 10% from the number

• Add 10% twice

• Divide 10% by 2

• Multiply 10% by 2

What is the result of multiplying 46 by 4 in the calculation?

• 230

• 92

• 200

• 184

What is the final step to find 45% of 460?

• Multiply 184 by 23

• Subtract 23 from 184

• Divide 184 by 23

• Add 184 and 23

What is the final answer for 45% of 460?

• 200

• 184

• 230

• 207