A percentage is a way to describe a part of a whole. The amount of water in the bottle originally is 800 mm.
What are Percentages?
A percentage is a way to describe a part of a whole. such as the fraction ¼ can be described as 0.25 which is equal to 25%.
To convert a fraction to a percentage, convert the fraction to decimal form and then multiply by 100 with the '%' symbol.
Let the water in the bottle at the very initial be x.
Given that after reduction the amount of water in the bottle is 120 millimetres, also, the water is reduced by 85%, therefore, the amount of water that will be in the bottle is 15% of the original.
Water in the bottle = 15% of x
120 mm = 0.15 × x
x = 800 mm
Hence, the amount of water in the bottle originally is 800 mm.
Learn more about Percentages:
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