I have 2 questions pls answer me quickly, I need to due it Later

1) At the start of a birthday party , a room is quarter full of people . When another 90 people came in, it became half full. How many people can fully fit in the room ?

2) In an aquarium , 80% of the fishes are guppies and the rest are goldfish. If there are 4 goldfish, how many guppies are there ?​

Perry angelo is planning to open a restaurant. he has the resources to produce and sell either hamburgers or pizzas. so he does some research and finds that the new location has a good demand for pizza. he hires cooks, wait staff, and an accounts person for his new pizzeria. he also arranges for materials such as pizza ingredients and pizza boxes. determine three factors affecting perry's cost of making pizza. write down the name of the factors and their instances in this scenario.