Interest
Interest Formula | 
| \( A \;=\; P \cdot i \cdot T \) | 
| Symbol | 
| \( I \) = interest | 
| \( T \) = amount of time | 
| \( i \) = interest rate | 
| \( P \) = principle | 
Interest, abbreviated as I, is any amount of money you pay on a line of credit or loan that is in addition to the principal balance.

