Treon bought 25 apples at the grocery store for 15 what proportion should be used to find the amount of money for 3 apples

Well, if 25 apples is $15, then the equation is 15/25. Divide by 5/5 (which is another way of saying 1). You get 3/5. So now, you know that for $3 you get 5 apples. now to get the price of one apple, you must multiply both $3 and 5 by 1/5 so that you will get the price of one apple. One apple is $0.60. To get the price of 3 apples, just multiply $0.60 by 3 which gives you $1.80.

1. 0.3 •4 is the same as 4 groups of 0.32. 7•0.8 is the same as 7 groups of 0.83. it increases by 0.5 every time, so 0.5x4 it increases by 0.9 every time, so 0.9x5. 0.9•12=10.86. 0.47•5=2.35i can finish the next ones in a separate post