PLease note that in mathematics, "of" means multiplication. Thus, 12% of (3/4) of 1.8 can be rewritten as [tex] (\frac{12}{100}) \times \frac{3}{4}\times 1.8 [/tex]
Thus we have: [tex] 0.12 \times 0.75 \times 1.8 [/tex]
Now, [tex] 0.12 \times 0.75 \times 1.8=0.162 [/tex]
Therefore, 12% of (3/4) of 1.8 expressed as a decimal is 0.162.
Therefore, 0.162 is the correct answer.
