X is 30% of 200, What is x? ( is/of = p/100) * Your answer

Can someone check if i did this correct. it’s number 4 if you’re wondering.

Aswimming pool had 2.5 million liters of water in it. some water evaporated, and then the pool only had 22 million liters of water in it. what percent of the water evaporated?

What is 1/3x5 on anuber line what does it look like on a number line