Nathan usually drinks 36 ounces of water per day he read that he should drink 64 ounces of water per day if he starts drinking 64 ounces what is the percent increase round to the nearest percent

First determine how much it increased by. 36+X=64

X=28

It increased by 28

Now determine what percentage 28 is of 36

36 (Y) = 28

Y=.77777778

28 is a 77.78% (.7778) increase from 36

After you round, your answer is 78%