Just remember that the word "of" means "multiply" in mathematical terms
Now lets get started working out this problem of yours
[tex]0.004(6800) \\ \frac{0.004}{100} = 0.00004[/tex] [tex]0.00004(6800) \\ Actual Answer: 0.272 \\ Rounded Answer: 0.72[/tex]
Also, remember: [tex]5[/tex] and down is rounded to [tex]0[/tex] | [tex]6[/tex] and up is going closer to [tex]10[/tex]
