21 goes into 190 9 times. I did this on calculator and then on paper heres how
9
21/190
-189
1
At some levels its okay to just say 9 or 9 remainder 1 but I went further just in case
9.04
21/190 l l
-189VV
100
- 84
16
It is a repeating decimal so I'm sure you wont have to go further than that