urgent help need in chart based on a scenario

[arulsettu]

in chart for example i want show there late attendance and how many attended

[arulsettu]

i want to combine this two scripts

count([Late Start])

Count(session_specialty)

in a chart

so late start in %

session in number format

[arulsettu]

need to display

start time in %

late start in %

session count in numbers

urgent plz