Ratio, Proportion and Rates of Changes Flashcards
1
Q
What is the formula to work out the percentage decrease?
A
[(Old Value - New Value) / Old Value] × 100.
2
Q
What is the formula to work out percentage increase?
A
(new value−original value)original value×100
3
Q
How would you find out simple interest?
A
% of original amount x time period of investment
4
Q
how would you find compound interest?
A
starting amount x multiplier ^ number of times interest is applied
