SQL percent rank by increasing increments

Question

I have this data:

number type     dates       subtype  funds
118111  savings 21/05/2119  cash2   9026
119222  checking 21/12/2121 cash1 2574
120333  savings 11/06/2120  check1  3761
121444  savings 20/06/2122  check1  1661
122555  savings 12/08/2119  check1  7227

And I want to find for each group of type and sybtype the percentiles by increments of 0.005, starting through 0.005 up to 0.995 (0.005, 0.01, 0.015...).

For each row, I need to get the change of the amount from the previous percentile in percentage of amount.

savings cash2 1000 0.015 1%
savings cash2 1040 0.02 4%

and from there, for each pair I want to pull the data of only three rows that are AHEAD of the ones with the biggest percentage change. So if 4% is one of the 3 biggest change for this group, then the row with the 0.015 will be picked.

I've tried this:

 SELECT type, subtype, funds, PERCENT_RANK()
 over (partition by type, subtype
 order by funds)
 from myTable

so I get each pair and percentile, but it's not in increments and I'm unsure how to proceed.

EDIT:

Got up to here:

select type, subtype, funds, ranking
from (
    SELECT type, subtype, amount, 
    ((cast(funds as float)/cast(lag(funds)
    OVER (partition by segment, subtype order by amount) as float))- 1) * 100 AS percentage,
    ROUND(PERCENT_RANK() over (partition by type, subtype order by funds)/0.005,0) * 0.005 as percentile
    from myTable) mt(type, subtype, funds,percentage,ranking)
    where ranking between 0.75 and 0.995
    order by ranking ASC```