Chart: a sum of some values as a percentage of a sum of others

This type of question, asked 2 times: 15 Nov 2020 Tier II, 29 Jan 2022 Tier II. All 4 questions below, oldest first.

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Question 1
15 Nov 2020 Tier II
40 $Study the given graph and answer the question that follows. The total revenue in 2015 and 2017 is what per cent of the total expenditure of the company in 2016, 2018 and 2019 (correct to one decimal place)?$
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Question 2
15 Nov 2020 Tier II
80 $Study the given graph and answer the question that follows. The number of employees in department B is what per cent of the total number of employees working in departments D and E?$
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Question 3
29 Jan 2022 Tier II
3 $Study the given graph and answer the question that follows. Production of fertilisers by countries X, Y and Z from 2016 to 2020 (in million tonnes) The total production of fertilisers by country Y in 2017 and 2019 and by country X in 2016 is what percentage of the total production of fertilisers by country Z in 2016, 2018 and 2020?$
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Question 4
29 Jan 2022 Tier II
58 $Study the given pie charts and answer the question that follows. The number of students who passed the examination from institute C is what percentage of the total number of students who appeared from institutes D and E?$
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Question 1