What is 8 more than 83 1/2% of 20?

83.5%  of $20$ is easily found by multiplication. First convert 83.5% to a decimal, which is 0.835. Now multiply by 20.
$\left(0.835\right) \left(20\right)$ = $16.7$ Now add $8$.
$16.7$ + $8$ = $24.7$