I am scoring around 60-70 percentile in Cracku mock as of now can you tell me how can I improve my score in all three sections and if my percentile remain constant how much I can expect in actual CAT exam?

This is what I think about percentiles.
Mock - 60-70% , CAT ~ 70 -80%
Mock - 70 -80%, CAT ~ 80 - 90%
Mock - 80-90%, CAT ~ 90 - 97%
Mock - 90+ , CAT ~ 97+
Mock - 95+ CAT ~ 99+
Mock - 98+ , CAT ~ 99.5
Mock - 99+, CAT close to hitting "The" Slot.
All these are for consistent scores averaged over at least 10 latest mocks!

bro in cracu mocks once i score in 60s i got rank under 50 but still 60 percentile .. its not like that ,, people are there who have scored in 70 percentile in mocks and managed to score 97in cat

Focus on sectional mocks