Shortcut on Finding 45 Percent Of A Number

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

Example:

Find 45% of 157.

Solution:

9 x 157 = 1,413
1,413 ÷ 2 = 706.5

70.65 (by moving the decimal point one place to the left)

Thus, 45% of 157 = 70.65