In a savings account, is calculated as a percentage of what you have saved.

Interest, in a savings account, is calculated as a percentage of what you have saved.

A bank will let you know what percentage of interest they pay monthly on your savings account. Each bank can vary by what they pay in interest so it is important to do your research and search for a bank that gives an amount back that is suitable to you. Keeping your money in savings allows for interest to accrue at a faster rate. 

The business cycle is the periodic but irregular up-and-down movement in economic activity, measured by fluctuations in real gross domestic product (gdp) and other macroeconomic variables. a business cycle is typically characterized by four phases—recession, recovery, growth, and decline—that repeat themselves over time. economists note, however, that complete business cycles vary in length. the duration of business cycles can be anywhere from about two to twelve years, with most cycles averaging six years in length. some business analysts use the business cycle model and terminology to study and explain fluctuations in business inventory and other individual elements of corporate operations. but the term "business cycle" is still primarily associated with larger (industry-wide, regional, national, or even international) business trends.

The  atomic nucleus  is the small, dense region consisting of  protons  and  neutrons  at the center of an  atom, discovered in 1911 by  ernest rutherford based on the 1909  gold foil experiment.