The price of an item selling at 150% of its $63 value is

You just have to multiply the percentage by the amount:

(150/100) * $63

1.5*$63 = $94.50

If you aren't allowed a calculator, then just find half of $63 (the 0.5 of the fraction) and add it to $63 (the 1. of the fraction).

$63:2 = $31.5

$63+$31.5 = $94.50