Geo 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.

78%

Step-by-step explanation:

The percentage change is calculated from ...

... percent change = ((new amount) - (old amount)) / (old amount) * 100%

... = (64 - 36) / 36 * 100%

... = 28/36 * 100%

... ≈ 0.78 * 100%

... ≈ 78%