Write 3-5 sentences of about the process of Grouping

To determine the extra amount that bob will have to pay for the car if he used credit card, we multiply the amount he has to pay by the decimal equivalent of the percentage given. that is,
                            extra amount  = ($1763.00) x (0.30)
                                                    = $528.9
thus, the extra amount that has to be paid due to interest rate is approximately $528.9.