Evaluate:
$80\%$ of $50\%$ of $250\%$ of $34 = ?$

Evaluate:
$23\%$ of $8040 + 42\%$ of $545 = ?\%$of $3000$

Evaluate:
$(180\%$ of $?)$ $÷ 2 = 504$

Evaluate:
$(31\%$of $260)\times ? = 12896$

Evaluate:
$150\%$ of $15 + 75\%$ of $75 =$ $?$

Evaluate:
$(0.5\%$ of$640)\times (1.3\%$ of $350) =?$

Evaluate:
$?\%$ of  $400 = 60$

Evaluate:
$53\%$ of $120 + 25\%$ of $862 = ?\%$ of $500$

$\frac{5}{6}$ of a number is $720$. What is $45\%$ of the number?