Calculator process

First convert ratio in to small ratio so
25:20 divided by 5 , It become 5:4 . Then for example Rs 36000- you have to share in ratio of 5:4

5 /9 and 4/9
So in calculator 36000 divided by 9 multiply with 5 answer will be 20000/- , similarly 36000/- divided by 9 multiply by 4 answer will be 16000/-

Rs 36000/- in the ratio of 5;4 you will get 20000/- and 16000/- respectively .