Question

Write 81% as a decimal

Answer 1

0.81

You can just move the decimal to the left two times (but since there are no decimals in this fraction, just pretend there is a decimal after the 1).

If you had to change 21.43% into a decimal, you can just move the decimal two spaces to the left, which would then be .2143.

Answer 2

To write a percent as a decimal, first remember that a percent is a ratio that compares a number to 100. We can think of 81% as the ratio $\frac{81}{100}$ or 81 ÷ 100. Remember that dividing by 100 moves the decimal point 2 places to the left. 81 ÷ 100 would move the decimal point 2 places to the left, which would give us .81 or 0.81. Therefore, 81% can be written as the decimal 0.81