Diane is making cookies. Of the first 260 she made, 75% had sprinkles on top. After she made 40 more cookies, the overall percentage of cookies with sprinkles rose to 78%. The number of 40 extra cookies at a sprinkles is

Answer 1

number with sprinkles of the first 260
= .75(260) =195

she made 40 more, so for the first 300, sprinkles account for 78%
number of sprinkles for the first 300 = .78(300) = 234

Make use of this after you decide what the rest of your question is
supposed to ask.