$\begin{aligned} & \text { [ Problems on percentages and ratios } \\ & \text { [ Problems with inequalities. Case analysis }]\end{aligned}$

Petya had $10\%$ more "Fanta" in his bottle than Vasya. Petya drank $11\%$ of its contents from his bottle, while Vasya drank $2\%$ of the contents from his bottle. Who had more "Fanta" left after this?
Let Vasya have $a$ ml of "Fanta" in his bottle, then Petya had $1.1 a$ ml. After each boy drank from their bottle, Vasya had

$0.98 a$ ml left, and Petya had $-0.89 \cdot 1.1 a = 0.979 a$ ml.

## Answer

Vasya.