Table below shows the info about four ingredients used to make a type of cake.
The ratio of the ingredients A,B,C and D used is 3:2:5:4
Find the percentage increase of ingredient C from the year 2021 to the year 2025 if the price of other ingredients remains unchanged from the year 2023 to the year 2025.
what i am trying to do is
(6*115+5*126+7*150+2x)/(6+5+7+2) =155.4 solve for x and x-100 =269%