Question

If A is increased by 20%, it equals B. If B is decreased by 50%,it
equals c. Then 20 % of A is what equal to C.

Answer 1

Answer:

let a be x percent

and b be y percent

and b be z percent

therefore,

x +20 = y.....(1)

y-50 = z

substituting the value of y from eqn 1 we get

x + 20 -50 = z

z = x - 30

hence when a is decreased by 30 is equals to c

Answer 2

$\boxed{\huge\mathfrak\color{aqua}answer}$

Asuuming all values,

$a + 20\% \: = \: b(equation \: i)$

$b - 50\% = c(equation \: ii)$

$\rightarrow \: b = c + 50\%$

Now putting the value of b in equation (ii)

$a + 20\% = c + 50\%$

$\rightarrow \boxed{ \: a - 30\% = c}(answer)$