Recall that metric prefixes represent specific powers of ten, which are used to express multiples or fractions of units.
Identify the factor associated with each prefix: 'deca-' means 10¹ (10), 'hecto-' means 10² (100), 'kilo-' means 10³ (1000), and 'centi-' means 10⁻² (0.01).
Understand that the question asks for the prefix representing a factor of 100, which corresponds to 10².
Match the factor 100 to the correct prefix, which is 'hecto-'.
Conclude that 'hecto-' is the metric prefix representing a factor of 100.