Question

log method
0.5X0.6/20​

Answer 1

Log(0.5×0.6/20)

Log(0.3/20)

Log 0.3 - Log 20

-1.82390

Answer 2

$0.5 \times 0.6 \div 20 \\ = 0.5 \times \frac{60}{10} \div 20 \\ = 0.5 \times \frac{60}{10} \times \frac{1}{20} \\ = \frac{5}{10} \times \frac{3}{10} \\ = \frac{15}{100} = 0.15$