The term can be defined as a signal that is continuous over a period of time as opposed to digital, which is a non-continuous signal.
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The term analog can be defined as a signal that is continuous over a period of time as opposed to digital, which is a non-continuous signal.

Explanation:

An analog signal is a signal that can assume any value from a continuous range (infinite or limited by the range of variation). Its values can be determined at any time, thanks to the mathematical function describing the given signal. The opposite of an analog signal is a digital signal.

part a. there were 250 teenagers surveyed (100% of tenagers = 250)therefore 1 % = 250/100 = 2.5 76% = 1% x 76 = 2.5 x 76 = 190 teenagers of the 250 surveyed liked burgerspart b: jane surveyed 25% (which is equal to 50 teenagers, i.e. a quarter of the teenagers surveyed is 50) to get 100% we simply get 4 quarters, i.e. multiply 50 by 4 = 200 teenagers were surveyed by jane. part c: it is impossible to give an example where a percentage is greater than 100%, since, by definition , percentage means "per 100".