Article passes through two dealers with known overall profit and first dealer's profit: second dealer's profit percent

The same question, asked 2 times: 21 Jul 2023 S1*, 17 Sep 2024 S2. Every wording below, oldest first.

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Question 1
21 Jul 2023 S1
70 $A sold an article to B at 25% profit and B further sold it to C by earning a certain profit. If the cost price of C is 30% more than the cost price of A, then find the profit percentage earned by B.$
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Question 2
17 Sep 2024 S2
68 $An article passing through two hands is sold at a total profit of 40% of the original cost price. If the first dealer makes a profit of 30%, then the profit percentage made by the second dealer is:$
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Question 1