Question

please solve all the three problems.

Answer 1

Hey

Here is your answer,

(i)Calculate percentage change
from V1 = 80 to V2 = 100
(V2−V1)/V1×100
=(100−80)/80×100
=20/80×100
=0.25×100
=25%change
=25%increase

(ii)Solution:
Calculate percentage change
from V1 = 100 to V2 = 80
(V2−V1)V1×100
=(80−100)1001x100
=−20/100×100
=−0.2×100
=−20%change
=20%decrease

(iii)Solution:
Calculate percentage change
from V1 = 6.25 to V2 = 7.5
(V2−V1)/V1×100
=(7.5−6.25)/6.25×100
=1.25/6.25×100
=0.2×100
=20%change
=20%increase

Hope it helps you!

Answer 2

i)Calculate percentage change from V1 = 80 to V2 = 100(V2−V1)/V1×100=(100−80)/80×100=20/80×100=0.25×100=25%change=25%increase
(ii)Solution:Calculate percentage change from V1 = 100 to V2 = 80(V2−V1)V1×100=(80−100)1001x100=−20/100×100=−0.2×100=−20%change=20%decrease
(iii)Solution:Calculate percentage change from V1 = 6.25 to V2 = 7.5(V2−V1)/V1×100=(7.5−6.25)/6.25×100=1.25/6.25×100=0.2×100=20%change=20%increase