-------------------------------------------------------------------- Given information -------------------------------------------------------------------- 4/7 mountain bikes sold 24 mountain bikes left
-------------------------------------------------------------------- Equate the fraction and find 1 whole -------------------------------------------------------------------- 3/7 of the bikes = 24
-------------------------------------------------------------------- Divide by 3/7 on both sides -------------------------------------------------------------------- Total bikes = 24 ÷ 3/7 Total bikes = 56
-------------------------------------------------------------------- Answer: There were 56 bikes originally --------------------------------------------------------------------