Question

30 percent of the class were chewing gum.12 were chewing gum how many were in the class

this is the next one
the prince of petrol this week was 1.98 my car can hold 28 liters of fuel.if it cost 48 to fill it up how many liters were on the tank before I filled up

PLEASE HELP ME

Answer 1

Alright. For the first one, we must think, thirty percent of what number is equal to twelve? We can right that in equation form as