JAMB - Economics (2014 - No. 44)
If the national income is 60m, the contribution of the manufacturing sector is
18m
17m
12m
9m
설명
To calculate the percentage each slice is worth, measure the angle of each slice and divide this by 360 then multiply it by 100. To find the number of pieces of data each slice represents, multiply the percentage that each slice is worth by the total number of the data sets.
108 ÷ 360 x 60 = 18m