The zoo has lions, giraffes, and gorillas. 2/5 of the animals are lions and 3/10 of the animals are giraffes. What percentage are gorillas?

Answer 1

7/10

Answer 2

2/5+3/10=7/10

Answer 3

7/10 is not possible ....

2/5 or 40% are lions
3/10 or 30% are giraffes

leaving 30% for gorillas

Answer 4

1 - 4/10 - 3/10 = 3/10 = 30/100= 30%