What would happen to the contribution of security selection to overall performance if the actual return on the equity portfolio had been 8.28% instead of 7.28% and the return on the bond portfolio had been .89% instead of 1.89%? Explain your result.

Actual Return for Equity at 7.28% and Bond at 1.89%

Actual Return for Equity at 8.28% and Bond 0.89%

I need help explaining the results from the changes in percentages for the Equity and Bond