Cookies!

Problem:



Solution:

Let $x$ be the number of cookies the bakeshop creates.

$x \times \frac{25}{100} = 625$

We can solve this equation by first make the fraction simpler by canceling 25 with 100, leaving

$x \times \frac{1}{4} = 625$

Then it is obvious that multiply two sides by 4 will give the answer we want 

$x \times \frac{1}{4} \times 4= 625 \times 4$
$x = 2500$

Therefore you planned to produce 2,500 cookies that day!