Percentage addition of differing amounts

[GT3GOODGUY]

How would I calculate questions that involve different amounts of percentages? for example:

2-fold
I have a 50ml of substance A and 50mL of substance B (50%) = Substance C

10-fold
I then put 10mL of this solution (substance C) into 90mL substance B .... = substance D

What is the final percentage content of substance B in the final substance D

 

[Deleted member 4993]

How would I calculate questions that involve different amounts of percentages? for example:

2-fold
I have a 50ml of substance A and 50mL of substance B (50%) = Substance C

10-fold
I then put 10mL of this solution (substance C) into 90mL substance B .... = substance D

What is the final percentage content of substance B in the final substance D

Please show us what you have tried and exactly where you are stuck.

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[Dr.Peterson]

How would I calculate questions that involve different amounts of percentages? for example:

2-fold
I have a 50ml of substance A and 50mL of substance B (50%) = Substance C

10-fold
I then put 10mL of this solution (substance C) into 90mL substance B .... = substance D

What is the final percentage content of substance B in the final substance D

How much of substance A is in the 10 mL of solution C that you transfer?

What is the total volume of the final mixture (solution D)?