Lake Crystal has twenty percent fewer frogs than Lassie Lake. If Lassie Lake has forty-five frogs, how many frogs are there in total in the two lakes?
Lake Crystal has twenty percent fewer frogs than Lassie Lake, a total of 20/100*45=<<20/100*45=9>>9 frogs
The total number of frogs in Lake Crystal is 45-9=<<45-9=36>>36
Together, the two lakes have 36+45=<<36+45=81>>81 frogs
#### 81