| A | B |
|---|
| Percent Proportion | a/b = p/100 |
| The percent equation | a = p% * b |
| Percent of Change | p% = amount of increase or decrease/Original amount |
| Percent of Increase | p% = increase/original |
| Percent of Decrease | p% = decrease/original |
| Finding a new amount (increase) | new amount = original * (100% + p%) |
| Finding a new amount (decrease) | new amount = original * (100% - p%) |
| Finding a Retail Price (method 1) | Retail = Wholesale + Markup |
| Finding a Retail Price (method 2) | Retail = Wholesale * (100% + Markup %) |
| Finding a Sale Price (method 1) | Sale = Original - Discount |
| Finding a Sale Price (method 2) | Sale = Original * (100% - Discount %) |
| Total Food Bill | Total = Food + Tax + Tip |
| Finding an Original Amount | Retail = Wholesale * (100% + Markup %) |
| Simple Interest | I = Prt |
| In the simple interest formula, P stands for | Principal |
| In the simple interest formula, I stands for | Interest |
| In the simple interest formula, r stands for | rate |
| In the simple interest formula, t stands for | time (in years) |
| Finding the Balance | A = P(1 + rt) |
| The variable we use to represent the balance in interest problems | A |
