What is x when 21 divided by x equals 77?

In other words, what would the divisor be if the dividend were 21 and the quotient 77?

To find the answer, just divide the dividend by the quotient: 21 ÷ 77 = 0.27272727272727

To prove this, let's compute 21 divided by 0.27272727272727: 21 0.27272727272727 = 77

How does it work?

Asking what the value of x could be when 21 divided by x gives a result of 77, is equivalent to solving the following equation:

21 x = 77

  1. Multiply both sides by x: 21 x x = 77 x
  2. 21 x x is equivalent to x x × 21 , which simplifies to 1 × 21 (or just 21 ).
  3. Thus, the equation becomes: 21 = 77 x
  4. To find x, divide both sides by 77: 21 77 = 77 x 77
  5. Which gives, after simplification: 0.27272727272727 = x (or x = 0.27272727272727 )

So, if the dividend is 21 and the quotient is 77, the divisor is 0.27272727272727.