Solution:Old forts in India = ½ × 100 = 50
New forts in India = 100 - 50 = 50
Old forts in Pak = 2/3 × 300 = 200
New forts in Pak = 300 - 200 = 100
Old forts in AUS = 3/4 × 400 = 300
New forts in AUS = 400 - 300 = 100
Old forts in USA = 2/3 × 600 = 400
New forts in USA = 600 - 400 = 200
Old forts in UK = 7/8 × 800 = 700
New forts in UK = 800 - 700 = 100
Country | Total forts | Old forts | New forts |
India | 100 | 50 | 50 |
Pak | 300 | 200 | 100 |
Aus | 400 | 300 | 100 |
USA | 600 | 400 | 200 |
UK | 800 | 700 | 100 |
New forts in India and Pak are 50 and 100 respectively.
New forts in USA and UK are 200 and 100 respectively.
Required percentage = (100 + 50)/(200 + 100) × 100
= 150/300 × 100 = 50%