What is x when 100 divided by x equals 21?

In other words, what would the divisor be if the dividend were 100 and the quotient 21?

To find the answer, just divide the dividend by the quotient: 100 ÷ 21 = 4.7619047619048

To prove this, let's compute 100 divided by 4.7619047619048: 100 4.7619047619048 = 21

How does it work?

Asking what the value of x could be when 100 divided by x gives a result of 21, is equivalent to solving the following equation:

100 x = 21

  1. Multiply both sides by x: 100 x x = 21 x
  2. 100 x x is equivalent to x x × 100 , which simplifies to 1 × 100 (or just 100 ).
  3. Thus, the equation becomes: 100 = 21 x
  4. To find x, divide both sides by 21: 100 21 = 21 x 21
  5. Which gives, after simplification: 4.7619047619048 = x (or x = 4.7619047619048 )

So, if the dividend is 100 and the quotient is 21, the divisor is 4.7619047619048.