GCSE Maths Practice: percentage-change

Question 2 of 10

Which correctly find the original value before a % decrease?

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\( \begin{array}{l} \text{Which correctly find the original value before a % change?} \end{array} \)

Select all correct options:

\( \text{£90 after 10% off → £100 original} \) \( \text{£84 after 30% off → £120 original} \) \( \text{£66 after 40% off → £110 original} \)

Check calculations carefully for each option.

Use formula: Original = Final ÷ (1 - % decrease)