mixed number is
(whole number) and (proper fraction)
proper fraction is a/b where b is not equal 0 and a<b
11.836=11+0.836
11 is the whole part
we need to convert 0.836 to fraction
ok
remember decimals
0.1=1/10
0.01=1/100
0.001=1/1000
so
0.836=836/1000=418/500=209/250
the mixed number is 11 and 209/250