³ÉÈËÂÛ̳

Limits of accuracy or bounds are used to describe all the possible values that a rounded number could be.

A fraction is part of a whole and is shown by writing one whole number, the numerator above another, the denominator.

Numbers that divide exactly into another number, leaving no remainder are called factors. A prime number has exactly two factors, itself and 1.

Reverse percentages involve working backwards through a calculation to find the original amount before a percentage change.