In: Finance
This month's commodity index decreased by one-tenth of last month's index to 360. What was last month's index?
The last month's commodity index (before the decrease) is _______ .
Please explain step by step so I gain an understanding of how you get to the answer.
The last month's commodity index lets say = x
This month's commodity index decreased by one tenth of last month's index to 360=
x-x/10 =360
10x-x/10= 360
9x/10=360
9x=360*10
9x=3600
x=3600/9
x=400 .
so the last month's commodity index before decrease is = 400