Rita uses 10 buttons on each rag doll she makes for her toy business. Two-fifths of the buttons she uses are blue and the rest are red. If Rita makes 115 rag dolls, how many red buttons does she use?

Respuesta :

Number of rag dolls made by Rita = 115
Number of buttons Rita uses on each rag doll = 10
Then
Total number of buttons required by Rita = 115 * 10
                                                                  = 1150
Number of blue buttons used by Rita = (2/5) * 1150
                                                            = 2 * 230
                                                            = 460
Then
The total number of red buttons used by Rita = 1150 - 460
                                                                         = 690
So Rita uses 690 red buttons for making 115 rag dolls. I hope the procedure is clear enough for you to understand.