Question

To calculate 4 1/5% tax on $63.78, multiply 4.2 times 63.78. True or False.

Answer 1

The answer is false

Answer 2

$\bf {{ a}}\%\ of\ b \implies \cfrac{{{ a}}}{100}\cdot b\implies {{ a}}\div 100\cdot b\qquad thus\\\\ -----------------------------\\\\ {{ 4\frac{1}{5}}}\%\ of\ 63.78 \implies \cfrac{{{ 4\frac{1}{5}}}}{100}\cdot 63.78\implies {{ 4\frac{1}{5}}}\div 100\cdot 63.78$

you tell us, what would you end up multiplying 63.78 there, to get the 4 1/5% of it?