Two successive increases versus two successive decreases by the same percent: by what percent one exceeds the other

This type of question, asked 2 times: 20 Jul 2023 S2, 26 Sep 2024 S1. All 2 questions below, oldest first.

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Question 1
20 Jul 2023 S2
71 $Two successive increments of 30% each is by what percentage more than two successive decrements of 30% each? (Correct to two decimal places)$
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Question 2
26 Sep 2024 S1
75 $25\%$
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