# Need help in biology calculation from graph alevels watch

1. Hi

need quick help in calculation
have no idea how to calculate
2. (Original post by Qer)

Percentage change = differences between two values/original value x100.

Read from the graph at 4kpa, the adult haemoglobin concentration is 80. The anaemic haemoglobin concentration is 22. 80-24 is 56% difference. for this question its just asking you the range basically, larger - smaller = percentage difference.
3. (Original post by Zozaaaa)
Percentage change = differences between two values/original value x100.

Read from the graph at 4kpa, the adult haemoglobin concentration is 80. The anaemic haemoglobin concentration is 22. 80-24 is 56% difference. for this question its just asking you the range basically, larger - smaller = percentage difference.
THANKS
WOULD YOU ALSO TELL ME HOW TO DO THIS
http://filestore.aqa.org.uk/resource...-74011-SQP.PDF
QUESTION 2
PART 2

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