RS Aggarwal Solutions for Class 7 Chapter 10 "Percentage", in mathematics, a percentage is a number or ratio expressed as a fraction of 100. It is often denoted using the per cent sign, "%", although the abbreviations "pct.", "pct" and sometimes "pc" is also used. A percentage is a dimensionless number; it has no unit of measurement. It can therefore be written as both a decimal and a fraction. To write a percentage as a decimal, divide it by 100. For example, 50% becomes 0.5, 20% becomes 0.2, 1% becomes 0.01 and so on. Topics covered in this chapter are, convert a fraction into a percentage, convert a percentage into a fraction, percentage as a ratio, convert a given ratio into a percentage, convert a given percentage in decimal form, and convert a given decimal into a percentage, word problems on percentage.