Sixty

Sixty percent of one-fifteen of the total is equal to thirty. What are two percent of the total?

Correct result:

p =  15

Solution:

$$\begin{gathered} 0.60\cdot (1\mathrm{/}15)\cdot c=30 \\ 0.04c=30 \\ {\displaystyle \frac{1}{25}}c=30 \\ c=750 \\ p=0.02\cdot c=0.02\cdot 750=15 \end{gathered}$$

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