Respuesta :

Kunchan
increment 
430 - 400
30

increment percentage
(30 / 400) * 100
(3 / 40) * 100
300 / 40
7.5 %

INCREMENT

430-400=30

PERCENTAGE

(30/400)*100

(30/40)*100

300/40=

7.5% is your final answer

I hope I could help