The prism is partially filled with 150 cubic cm of sand what fraction of the prism is filled by the sand

Since 150 can't go into 250 twice as a whole, you know that the percentage is over 50% . To find the percentage (I think, bad memory) You need to find the difference or increase between the two. 250 / 150 = 100 Then divide the increase or difference by the original number (As in 150) then multiply that by 100. The percentage would be 66% 

Hope this helps, though would ask someone again just to be sure

A)26•2=52there are 2 sides with the same length116-52=64the other 2 side have to be half of 64 each64/2=32the width is 32b)make two sentences about these steps because your teacher knows how you write and explain things.

For a 0.25 pfor b o.3pp (0.25+0.3)=0.28