3 years savings

Simple interest - Tereza has deposited CZK 100,000 in the bank with an annual interest rate of 1.5%. Interest is added each year and left aside. How many CZK crowns will has total after 3 years?

Correct result:

x =  104500 Kc

Solution:

$$\begin{gathered} a=100000 \\ q=1.5\mathrm{/}100={\displaystyle \frac{3}{200}}=0.015 \\ u=a\cdot q=100000\cdot 0.015=1500 \\ x=a+3\cdot u=100000+3\cdot 1500=104500\text{ Kc} \end{gathered}$$

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