Answer:
The original number is [tex]83.1[/tex]
Step-by-step explanation:
Let
x -----> the original number
Remember that
[tex]100\%+7.1\%=107.1\%=107.1/100=1.071[/tex]
The increased number is equal to multiply the original number by the factor 1.071
so
[tex]89=1.071x[/tex]
Solve for x
Divide by 1.071 both sides
[tex]x=83.1[/tex]
