Calculation: The production of sugar in 2014 = 280 The production of sugar in 2015 = 320 The percentage increase in the production of sugar in 2015 as compared to that in its preceding year 2014 = ⇒ (40/280 × 100) ⇒ 14.28% The production of sugar in 2015 = 320 The production of sugar in 2016 = 380 The percentage increase in the production of sugar in 2016 as compared to that in its preceding year 2015 = ⇒ (60/320 × 100) ⇒ 18.75% The production of sugar in 2016 = 380 The production of sugar in 2017 = 400 The percentage increase in the production of sugar in 2017 as compared to that in its preceding year 2016 = ⇒ (20/380 × 100) ⇒ 5.26% The production of sugar in 2017 = 400 The production of sugar in 2018 = 440 The percentage increase in the production of sugar in 2018 as compared to that in its preceding year 2017 = ⇒ (40/400 × 100) ⇒ 10% The production of sugar in 2018 = 440 The production of sugar in 2019 = 480 The percentage increase in the production of sugar in 2019 as compared to that in its preceding year 2018 = ⇒ (40/440 × 100) ⇒ 9.09% ∴ The increase in the production of sugar as compared to that in its preceding year between 8% and 10% is 2019