Question

the total number of cupcakes carmen can bake depends on the amount of time she spends baking. Carmen can back 84 cupcakes in 1.6 hours. how many cupcakes can she back in 2 hours

Answer 1

84 cupcakes    
----------       =  divide top and bottom by 1.6=  52.5 cupcakes/1 hour  
1.6 hours

so if she can bake 52.5 cupcakes in 1 hours,
multiply by 2 to get 105 cupcakes in 2 hours.