Water in vegetables

Tomatoes in the store contain 99% water. After being transported to the shop, they were slightly dried and contained only 98% of water. How many kgs of tomatoes are in the store if there were 300 kg in stock?`

Correct result:

x =  150 kg

Solution:

$$\begin{gathered} S=(1-0.99)\cdot 300=3\text{ kg } \\ S=(1-0.98)\cdot x \\ x=S\mathrm{/}(1-0.98)=3\mathrm{/}(1-0.98)=150\text{ kg} \end{gathered}$$

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