Question

Question is in the attachment

Answer 1

➡ 50% of 80
➡ 50/100 * 80
➡ 40

➡ 25% of 40
➡ 25/100 * 40
➡ 10

So 40 - 10 = ₹30

Answer 2

First we find 50% of Rs 80.

40 is the 50% of the Rs 80. Then we find 25% of Rs 40.

10 is the 25% of the Rs 40.

So 40 - 10

==> Rs 30 (Answer).