You are developing a performance progress report for a project you are managing. The following timephased budget was developed earlier in the planning stage and is being used as the standard against which the project performance is measured.

$\backslash$table$[[$Work Packages,W$1,$W$2,$W$3,$W$4,$W$5,$W$6,$W$7,$W$8,$W$9,$W$10,$W$11],[$A$,5,2,9,,,,,,,,],[$B$,,,,9,4,1,,,,,],[$C$,,$vdots,,,,,$9,7,7,5,8],[$Total$,5,2,9,9,4,1,9,7,7,5,8]]$

You are analyzing the project performance at the end of Week $8.$ Activity $"C"$ is $20\%$ complete and its actual cost is $7.$ What is the Cost Performance Index of this activity?

Use two decimal places in your calculations.