Why is an increase 20-40 100% but a decrease of 40-20 is 50%

The increase of 20-40 is one hundred percent because it takes one hundred percent of the first number (20) and adds it to itself. but 40-20 is a fifty percent decrease because it takes half (50%) of 40 and subtracts it from itslef

Im pretty sure it is a

The great thing about this problem is they give you everything you need to solve it easily. so the expression is: 12h+30w12h+30wand so everywhere you have an “h” you place 66. and everywhere you have a “w” you place 33. then the expression will look like this: 12(66)+30(33)12(66)+30(33)from here you multiply and then add. getting the following of: $785,862hope this