Half of ramon's class have pets. a quarter of the students who have pets own fish. what fraction of the whole class own fish? a) 1/8b) 1/6c) 1/4d) 1/3e) 1/2* only answer if you are 100% sure of your answer. a quick response would be greatly appreciated. you.*

A) 1/8



Imagine you have a circular cake that hasn't been cut up yet. If you cut it in half, you have 2 equal pieces. Then if you cut each half into 4 pieces, you'll have 4*2 = 8 pieces total. So that's where the 1/8 comes from. 

To be more technical, its the result of multiplying 1/2 and 1/4
(1/2)*(1/4) = (1*1)/(2*4) = 1/8

Here's another more concrete example:
Let's say there are 16 people in the class
Half of them have pets so 8 of them have pets (half of 16 is 8)
Of those 8 people, a quarter have fish. So 2 people have fish (one quarter of 8 is 2). 
Comparing 2 to 16 is 2/16 = 1/8. So 1/8 of the class has fish

You must find the surface of the block therefore 98187 dived by 5628 = 583m squared