(1) A vitamin contains = 18.5mg of calcium
Then 60 tablets will contain
18.5mg x 60
Note 1 g = 1000mg
[tex]\begin{gathered} \frac{18.5}{1000}\times60 \\ 0.0185\times\text{ 60} \\ 1.11g \\ \end{gathered}[/tex]2) A vitamin contains = 18.5mg of calcium
Then 20 tablets will contain
18.5mg x 20
Note 1 g = 1000mg
[tex]\begin{gathered} \frac{18.5}{1000}\times20 \\ 0.0185\times20 \\ 0.37g \end{gathered}[/tex]