Question

6/10 of the class has a pet dog. 27/100 of the class has a pet cat. The rest of the class has a pet fish. What fraction of the class has a pet fish?

Answer 1

Answer: 13/100 have pet fish

Step-by-step explanation:

6/10 = 60/100

60/100 + 27/100 = 87/100 have cats and dogs

that leaves 13/100 have pet fish

Answer 2

LCM of 10 and 100 is 100

-> 6/10 = 6x10/10x10 = 60/100

The whole class is 1, so the fraction of the class that has a pet fish is : 1 - 60/100 - 27/100 = 13/100 (or 13%)