The graph below shows the percentage sales of trainers made by a sportwear company in one year The Flying Boots trainers were lunched at the beginning of that year

The pie chart illustrates the percentages of four different sport wears sales by a company in twelve- month period. Overall, the golden feet products are always the highest sales comparing than other brands.

Firstly, after launching the Flying Boots promoting campaigns, the volume of sales increases noticeably. Starting at only 10% in the first quarter, it rose to 25% in the second and third quarters and reached to 35% at the fourth quarter. Conversely, the percentages of the High Rollers sales gradually decreased. At the first quarter, the figure was 40% but it dropped to 25% and only 10% in the third and fourth quarters, respectively. Similarly, the sales of Zed Runners have also dropped rapidly throughout the year from beginning at 35% to roughly 10% at the fourth period.

Secondly, the most sales contributed to the Golden Feet products. The figures were approximately 40% from the first to the third quarter and the total sale rose dramatically to half of all sales in the last quarter. However, sales of the High Rollers brand stays on all-time low in all four quarters as the figures are at least two times lower than the Golden Feet sales.