Dishonest dealer with false weights (with or without markup and discount): profit percent

This type of question, asked 2 times: 6 Mar 2023 Tier II, 26 Oct 2023 Tier II. All 2 questions below, oldest first.

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Question 1
6 Mar 2023 Tier II
10 $A dishonest dealer marks up his goods by 50% and then gives a discount of 20% on the marked price. Apart from this, he uses a faulty balance which reads 1kg for 900 gm. What is his net profit percentage (rounded off to the nearest integer)?$
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Question 2
26 Oct 2023 Tier II
9 $B purchased 15 kg apples at the rate of ₹180 per kg from a wholesaler who uses a weight of 950 grams for the kg weight. B sold all these apples at ₹180 per kg but used a weight of 750 grams for the kg weight. Find the percentage profit earned by B in the transaction (correct to 2 places of decimal).$
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Question 1