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

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

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.