Mathematics for IGCSE & O level - Percentages (Section 3 - No. 11)
If a number increases by 10%, then decreases by 10%, what is the overall impact?
The number increases.
The number decreases.
The number remains the same.
The change is dependent on the initial value.
Vysvětlení
The 10% decrease after a 10% increase does not return to the original value.