Divide any 3-digit number by 99
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You can divide any 3-digit number by 99 using this trick. What is the trick? Take a look at the examples below showing how to do this in 2 steps.
Example #1
621 ÷ 99 = ?
Step 1
The number in the hundreds place or 6 in this case is always part of the answer. Therefore, write 6 down and then put a decimal point next to it: 6.
Step 2
Add 6 to 21
21 + 6 = 27
Put a line on top of 27 and put everything next to 6.
621 ÷ 99 = 6.27The line on top of 27 means that 27 is a repeating decimal.
6.27 = 6.272727272727Example #2
482 ÷ 99 = ?
Step 1
The number in the hundreds place or 4 is part of the answer. Therefore, write 4 down and then put a decimal point next to it: 4.
Step 2
Add 4 to 82
82 + 4 = 86
Put a line on top of 86 and put everything next to 4.
482 ÷ 99 = 4.86