Percent means "out of hundred". Percentage is a way of expressing a number or ratio as a fraction where the denominator is 100.
Any fraction or decimal can be converted into percentage form by converting into equivalent fraction out of 100. The numerator can then be written as a percent with a symbol of % added to it.
Percentages are used for comparison of numbers, in transactions like discount and interest rate.
Learnhive Lesson on Percentage