Mr Abdulla earns 25 750 after his salary increase of 8.5%. What did he earn before the increase?

Question

I tried: $$25 750 × 100÷8.5 =2188,75$$

$$25 750 - 2188,75 =23 561,25$$

Answer 1

Let $x$ be is original salary. Then $x \cdot (100+8.5)\%=x\cdot 1.085 = 25750$.

So $x=\frac{25750}{1.085}\approx 23733$.

Answer 2

Let his initial salary be $n$.

We have $$n + \frac{8.5}{100}n = 25750$$

or $$\frac{108.5}{100}n = 25750$$

From here find $n$.