try this, create a calculation as below
if [Quarter] = '01' then 1 elseif [Quarter] = '02' then 4 elseif [Quarter] = '03' then 7 elseif [Quarter] = '04' then 10 end
and then drag it to row/column and format as qq/yyyy
You can use [Quarter] + "/" + [Year]. This will give you result as Q1/2018.