Let's divide 840551 by 99
The aim is to understand the frequency of 99 in 840551.

On to step 1:
If we divide 8 by 99, we get 0 and a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Fetch the next digit (4) from the dividend, attach it to 8 and continue: 84 / 99

Going ahead to step 2:
The number 99 fits into 84 0 times, leaving a remainder of 84.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 84, we get 84.
Bring next digit (0) of the dividend behind the 84 and repeat the process: 840 / 99

Advancing to step 3:
The number 99 fits into 840 8 times, leaving a remainder of 48.
Put 8 as the next digit of the answer. 
Result so far: 8.0
Deduct 792 from 840 and we're left with 48.
Bring next digit (5) of the dividend behind the 48 and repeat the process: 485 / 99

Going ahead to step 4:
When dividing 485 by 99, we get 4 with a remainder of 89.
The next digit of our result is 4. 
Result so far: 84.0
Deduct 396 from 485 and we're left with 89.
Grab the next digit (5) from the dividend, add it to 89, then carry on: 895 / 99

Let's proceed to step 5:
895 divided by 99 is 9 with a remainder of 4.
The next digit of our result is 9. 
Result so far: 849.0
If we take 891 away from 895, we end up with 4.
Fetch the next digit (1) from the dividend, attach it to 4 and continue: 41 / 99

Advancing to step 6:
If we divide 41 by 99, we get 0 and a remainder of 41.
The number 0 becomes the next digit in our result. 
Result so far: 8490.0
If we subtract 0 from 41, we get 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Let's proceed to step 7:
When dividing 410 by 99, we get 4 with a remainder of 14.
Use 4 as the next digit of our solution. 
Result so far: 8490.4
Subtracting 396 from 410 leaves us with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

On to step 8:
When dividing 140 by 99, we get 1 with a remainder of 41.
The number 1 becomes the next digit in our result. 
Result so far: 8490.41
Subtract 99 from 140 to get 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

On to step 9:
99 can be fit into 410 4 times, resulting in a remainder of 14.
Write down 4 as next digit of the result. 
Result so far: 8490.414
Subtract 396 from 410 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Step 10:
If we divide 140 by 99, we get 1 and a remainder of 41.
Put 1 as the next digit of the answer. 
Result so far: 8490.4141
The remainder is 41 after subtracting 99 from 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Step 11:
99 can be fit into 410 4 times, resulting in a remainder of 14.
Write down 4 as next digit of the result. 
Result so far: 8490.41414
Subtract 396 from 410 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Step 12:
140 divided by 99 is 1 with a remainder of 41.
Use 1 as the next digit of our solution. 
Result so far: 8490.414141
If we take 99 away from 140, we end up with 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Advancing to step 13:
99 goes into 410 4 times with a remainder of 14.
Write down 4 as next digit of the result. 
Result so far: 8490.4141414
The remainder is 14 after subtracting 396 from 410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Moving on to step 14:
99 can be fit into 140 1 times, resulting in a remainder of 41.
The next digit of our result is 1. 
Result so far: 8490.41414141
If we subtract 99 from 140, we get 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Our division results in 8490.41414141 with a remaining 4.1e-08.