78.57142857%
the answer is above
you do 22/28
Sorry but I am depressed and I just need points for this but I’ll help you :)
<span>To calculate the change in CPI we need to do a % change formula. (New - Old) / (Old) = n. (121 - 110) / 110 = .10. This is equal to a 10% change in CPI.
To confirm the answer, do, (Old) * (1+n) = New CPI. 110*(1+.10) = 121. It equals so it is right!</span>
Yep you have done it correctly
