maths question?

Question

Louise sold some chickens on the internet for £94.50
She calculated that she made a profit of 26% on the cost price of the chickens.
However, when doing her calculation she forgot that she spent £3.50 on the postage for the chickens.
Work out her correct percentage profit.

Answer 1

Incorrect cost = 94.50/1.26 = 75.00

Correct cost = 75.00 + 3.50 = 78.50

Correct profit = (94.50 - 78.50)/78.50 = 20.4%

Answer 2

21.3%

do you want how i got to that?