



 
Katie, Compatible numbers are numbers that are close to the original numbers and ones that make the arithmetic easy. When I see 2,752/28 I immediately think that 28 is close to 30 and it's also close to 25 and each of these might make the arithmetic easy. If I choose to use 30 then I would like the numerator to be divisible by 3. The numerator 2,752 is close to 2,700 and 27/3 = 9 so the answer expected is
There are other "correct" answers to this question. For example 2,752 is close to 2,800 so you might say
or,
I hope this helps,  


Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences. 