Answer:
140%
Step-by-step explanation:
Percentage change in any variable is given by
percentage change = (new value - old value)/ old value * 100
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Given
Earlier amount of drinking water = 20 fl oz
New amount of drinking water = 48 fl oz
Percentage increase in drinking of water = (48-20)/20 * 100 = 28/20 * 100
Percentage increase in drinking of water = 28*5 = 140 %
Thus, there is 140% percentage increase in water by John.
