Divide:
$$ 19.2 \div 80 $$
The above question can be written as,
$$ 19.2 \div 80 =\dfrac{19.2}{80} $$
Multiplying both numerator and denominatorby 10, we get,
$$ = \dfrac{19.2 \times 10}{ 80 \times 10} $$
$$ = \dfrac{192 }{800} $$
By long division (as shown in image), We get
$$ 19.2 \div80 =\dfrac{192}{800}= 0.24 $$