Q.In a certain year, the primary sector contributed 17 per cent and the secondary sector contributed 26 per cent to a country's Gross Value Added. Calculate the share of the tertiary sector in that year.

Since the three sectors together must add up to the whole (100 per cent) of Gross Value Added, the tertiary sector's share is found by subtraction. …

The three sectors of an economy — primary, secondary and tertiary — together account for the entire Gross Value Added, so their shares must sum to 100 per cent.

Given: Primary sector share = 17%, Secondary sector share = 26%.

Tertiary sector share = 100% − (Primary share + Secondary share)

= 100% − (17% + 26%)

= 100% − 43%

= 57% …