Practice questions
Challenge questions
Two successive percentage changes
Word problems
Real-life contexts — read carefully and identify the calculation needed
Multiplier method
Increase by \(15\%\) → multiply by \(1.15\) · Decrease by \(20\%\) → multiply by \(0.80\)
The multiplier for an increase of \(p\%\) is \(1+\frac{p}{100}\). For a decrease it is \(1-\frac{p}{100}\).