Iq question part 2.

Percentage question.

90% of 30 is ?

Answer is 27.

1_ 40% of 60 is?
2_ 30 % of 80 is?
3_ 80 % of 900 is ?
4_ 30 % of 450 is ?
5_ 60 % of 60 is ?

Calculate quick as possible and give answer below.