ABHYAS PREP: DATA INTERPRETATION · DATA INTERPRETATION

Bar chart: percentage change between two years

Percentage change = (later − earlier) ÷ earlier × 100. The base is always the earlier year (or the year named after “over” / “compared with”).

Loading practice…

Worked examples

Example 1 · level 1

The bar chart shows Chola Motors’s production (in thousand tonnes). What is the percentage increase in production in 2022 compared with 2021?

6.5%
10.74%
12.04%
112.04%

Show solution

2021: 540; 2022: 605.
Change = 65.
Increase % = 65 ÷ 540 × 100 = 12.04%.

Answer: 12.04%

Example 2 · level 2

The bar chart shows Eastern Paper’s production (in thousand tonnes). What is the percentage increase in production in 2023 compared with 2019?

4.5%
12.33%
14.06%
114.06%

Show solution

2019: 320; 2023: 365.
Change = 45.
Increase % = 45 ÷ 320 × 100 = 14.06%.

Answer: 14.06%

Example 3 · level 3

The bar chart shows Deccan Textiles’s production (in thousand tonnes). What is the percentage increase in production in 2024 compared with 2022?

6%
21.82%
27.91%
127.91%

Show solution

2022: 215; 2024: 275.
Change = 60.
Increase % = 60 ÷ 215 × 100 = 27.91%.

Answer: 27.91%