Question 27199
hi. 
I hope this helps. 
here is the formula for proportions-
is over of (part over whole) equals the  % over 100
then, plug in the numbers. 
7 over 25  equals x over 100. 
Then you must cross multiply. resembles an X
7 times 100=700
then, divide by 25. 
700/25=28. 

7 is 28% of 25.