Hi!
If one tablet contains 10.5mg of calcium, then 20 tablets contain 20*10.5 mg = 210 mg.
1 g = 1000 mg
Knowing that : 210 mg = 0.21 grams
Hope this helps!
18/50 is an equivalent fration because when simplified it equals to 9/25
1104 cups per 1 restaurant
There are FOUR boxes EACH containing 1656 cups, MEANING that you will do 1656 x 4, getting 6624.
You divide this by 6, and TADA!
Hope this helps!