Calculate simple interest including in financial contexts.
Solve problems step-by-step involving multipliers over a given interval, for example, compound interest, depreciation, etc.
e.g. A car worth £15,000 new depreciating by 30%, 20% and 15% respectively in three years.
see also Percentage change, 2.03c
**Express exponential growth or decay as a formula.
e.g. Amount £A subject to compound interest of 10% p.a. on £100 as
Solve and interpret answers in growth and decay problems.
see also Exponential functions, 7.01d, Formulate algebraic expressions, 6.02a**