Decimal and, only the best mathematicians were able to multiply or divide large numbers. These difficulties were completely solved with the introduction of the Hindu–Arabic numeral system for representing integers. This system has been extended to represent some non-integer numbers, called "decimal fractions" or "decimal numbers" for forming the "decimal numeral system". For writing numbers, the decimal system uses ten decimal digits, a decimal mark, and, for negative numbers, a minus sign "−". The decimal digits are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9; the decimal separator is the dot "" in many countries (including English speaking ones),
Percentage in point Percentage in point In finance, specifically in foreign exchange markets, a percentage in point or price interest point (pip) is a unit of change in an exchange rate of a currency pair. The major currencies (except the Japanese yen) are traditionally priced to four decimal places, and a pip is one unit of the fourth decimal point: for dollar currencies this is to 1/100th of a cent. For the yen, a pip is one unit of the second decimal point, because the yen is much closer in value to one hundredth of other major currencies. A pip is sometimes confused