In two days, Gretchen drinks seven 16 - ounce bottles of water. She drinks the water in 4 equal servings. How many ounces of water does Gretchen drink in each serving

To work this out you must divide 16 by 4. This is because Gretchen drunk 16 ounces in 4 equal servings.

The answer is: 4

Gretchen drunk 4 ounces in 4 equal servings lasting over 2 days.

within 2 days she drinks seven 16 - ounce bottles of water

therefore the total volume of water she drinks - 7 x 16 = 112 ounces

she drinks a total of 112 ounces of water

she drinks the total volume in 4 servings

therefore 4 servings - - 112 ounces

then 1 serving - 112 / 4 = 28 ounces

she drinks 28 ounces of water in each serving