Car parking building

 

A central Christchurch parking building has 150 car parks available.
 
a)   How many car parks were used if the building was 72% full? __________


b)   The building has a sign at the entrance that shows what percentage of the car park is full.
      What would the sign show if there were
 
      i)   50 cars in the building? __________ %
 
      ii)  138 cars in the building? __________ %