Question

14 is 28% of what number

Answer 1

percentage formula :
is/of = %/100

14 is 28% of what number.
is = 14
% = 28
of = x
now sub
is/of = %/100
14/x = 28/100 (cross multiply since this is a proportion)
(28)(x) = (14)(100)
28x = 1400
x = 1400/28
x = 50

check..
14 is 28% of 50
14 = 0.28(50)
14 = 14 (correct)

so your answer is 50

you can always use this formula for percentage problems, just be sure and sub the numbers in the right place.