<span>Luke scored 21 goals in 7 games. if he scores goals at the same rate how many goals will he score in 23 games </span>the answer is 69 you divide 21 by 7 which is 3 and you multiply 3 by 23 and you get 69
All of the other answers share at least one factor they can be divided by (the numerator in all cases). 5/12 however shares no factors and cannot be simplified anymore.