Mathematically, the comparison between two numbers or quantities is known as ‘proportions’.Generally, it is referred to as the number, part or share considered in comparative relation to a whole. When two different ratios are equivalent, they are meant to be in a proportion. It is expressed using the symbol ‘::’ or ‘=’. For example, the time taken by a bike to cover 60 km per hour is equal to the time taken by it to cover the distance of 300 km for 5 hours. So, 60 km / hr = 300 km / 5hr.