To paint a sunset, Tran makes a shade of orange paint using 5 drops of red paint for every 8 drops of yellow paint. If Tran uses 15 drops of red paint, how many drops of yellow paint would he need?
5 / 8 = 15 / x....5 drops red to 8 drops yellow = 15 drops red to x drops yellow cross multiply because this is a proportion (5)(x) = (8)(15) 5x = 120 x = 120/5 x = 24 <=== 24 drops yellow
