If portfolio grades are worth 85% of my grade and I make a 100 on one that is worth 13 per cent of the 85 per cent how much will my grade go up
Your grade would go up by 11.05%.
To calculate this, you would first find what 13% of the total 85% is: 0.13 * 0.85 = 0.1105 or 11.05%.
So if you made a 100 on the portfolio worth 13% of the total 85%, your grade would increase by 11.05%.