The following table shows the sale of different brands of watches by a shop during 2014 — 2018.

Year	Brand (in thousands)
	Titan	Fastrack	Timex	Fossil
2014	366	205	247	96
2015	398	188	285	108
2016	312	175	388	112
2017	412	312	401	146
2018	288	202	255	126

Which brand of watches showed the highest percentage change in sales between 2014 and 2018?

Correct option is C

Given:

Sales in 2014:

Titan: 366  Fastrack: 205

Timax: 247 Fossil: 96

Sales in 2018:

Titan: 288 Fastrack: 202

Timax: 255 Fossil: 126 

Formula Used:

​$$\text{Percentage Change} = \frac{\text{Value in 2018} - \text{Value in 2014}}{\text{Value in 2014}} \times 100$$ 

​Solution:​

1. Titan's sales in 2014 were 366, and in 2018 they were 288. Using the formula:

​$$\text{Percentage Change for Titan} = \frac{288 - 366}{366} \times 100 = \frac{-78}{366} \times 100 \approx -21.3\%$$ 

Titan’s sales decreased by 21.3% from 2014 to 2018.​

2.Fastrack's sales in 2014 were 205, and in 2018 they were 202. Using the formula:

​$$\text{Percentage Change for Fastrack} = \frac{202 - 205}{205} \times 100 = \frac{-3}{205} \times 100 \approx -1.5\%$$ 

Fastrack’s sales decreased by 1.5% from 2014 to 2018.​

3. Timax’s sales in 2014 were 247, and in 2018 they were 255. Using the formula:

​$$\text{Percentage Change for Timax} = \frac{255 - 247}{247} \times 100 = \frac{8}{247} \times 100 \approx 3.2\%$$ 

Timax’s sales increased by 3.2% from 2014 to 2018.​

4. Fossil’s sales in 2014 were 96, and in 2018 they were 126. Using the formula:

​$$\text{Percentage Change for Fossil} = \frac{126 - 96}{96} \times 100 = \frac{30}{96} \times 100 \approx 31.3\%$$ 

Fossil’s sales increased by 31.3% from 2014 to 2018.

Thus, Fossil showed the highest percentage change in sales, with an increase of 31.3% from 2014 to 2018.​