Finding 45 percent of a number

Follow the following Steps:

1. Choose a 2-digit number.
2. Multiply the number by 9.
3. Divide by 2.
4. Move the decimal point one place to the left.

   Example-1:

1. If the number selected is 36:
2. Multiply by 9: 9 × 36 = 270 + 54 = 324
3. Divide by 2: 324/2 = 162
4. Move the decimal point one place to the left: 16.2
5. So 45% of 36 = 16.2.

Example-2:

1. If the number selected is 52:
2. Multiply by 9: 9 × 52 = 450 + 18 = 468
3. Divide by 2: 468/2 = 234
4. Move the decimal point one place to the left: 23.4
5. So 45% of 52 = 23.4.