Thread:Blueeighthnote/@comment-17897872-20140320020644/@comment-16894369-20140320150318

Changing the percentages to improper fractions, then changing the percentage sign to 1/100:

200/700,  250/900,  28/100 -> 2/7, 5/14, 7/25.

The simplist form is the above, however the numerator needs to be the same to fit the question: (Least common "numerator")

70/245, 70/196, 70/250.

Adding the denominators up, so the answer should be 691.