Question

shop A offers a single discount equivalent to two succussive discounts of 25 percent and 20 percent​

Answer 1

Hope this helps you.........

Answer 2

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$total \: discount = 100 - 100 \times (1 - \frac{20}{100} )(1 - \frac{25}{100} )$

$= 100 - 100 \times \frac{80}{100} \times \frac{75}{100}$

$= 100 - 60$

$= 40 \: percent$

Hope it helps...........