Question Details

Detailed explanation and options for the selected question.

A number is increased by 20% and then decreased by 10%. What is the net change?

A. 10% increase
B. 8% increase
C. 8% decrease
D. 10% decrease

Explanation:

Net change = (1.2×0.9 - 1) = 1.08 - 1 = 0.08 = 8% increase. Other options are incorrect.

Related Topics

How to Calculate the Volume of a Cone

Revision Notes

How to Solve Linear Equations (Two Variables)

Revision Notes

How to Calculate the Area of a Trapezoid (Trapezium)

Revision Notes

How to Apply Euler’s Theorem and Fermat’s Little Theorem

Revision Notes

How to Calculate Percentage Increase or Decrease

Revision Notes

How to Solve Proportions (Cross-Multiplication)

Revision Notes

How to Solve Radical Equations (Equations with Square Roots)

Revision Notes

How to Solve Systems of Inequalities Word Problems

Revision Notes

How to Identify Arithmetic vs. Geometric Sequences

Revision Notes

How to Perform a One-Way ANOVA

Revision Notes