Decimal currency is a system of money where the basic unit is divided into smaller, equal parts, typically in multiples of ten. For example, in the United States, one dollar is divided into 100 cents. This makes calculations easier and more straightforward, as people can quickly understand and convert between different denominations. Many countries around the world have adopted decimal currency, including Canada, Australia, and most nations in the European Union. The shift to decimal currency often simplifies transactions and accounting, allowing for more efficient trade and commerce.