Question

What is 50% of 42.88

Answer 1

$multiply \ 50\%\ times\ a \ number\\\\ 50\% * 42.88=0.5*42.88=21.44\\\\ 50\%\ of\ 42.88\ is\ equal\ to\ 21.44$

Answer 2

To find 50 percent, you multiply the number by 0.5 (for 30%, 0.3 etc.).
42.88 * 0.5 = 21.44