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# How to calculate percentage increase for the following question! watch

1. Calculate the percentage increase in the total volume of air breathed in per minute when the concentration of carbon dioxide was increased from 0.04 to 6.0 %. Show your working. (2m)
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2. For % increase, use the following formula:

New-original/original *100.

Use the table to find the values for 0.04% and 6%

0.04%- 670
6%- 2100

So you do

2100-670/670 *100= 213%

Hope that helps.
3. First you must calculate % air breathed per min using the formula: volume of air in one breath x breaths per minute0.04%: 670 x 14 = 93806%: 2100 x 27 = 56700Increase = final - original = 98700 - 9380 = 47320Then % increase = increase / original x 100 = 89320 / 9380 * 100 = 505% (3sf)
4. (Original post by jennyonas)
First you must calculate % air breathed per min using the formula: volume of air in one breath x breaths per minute0.04%: 670 x 14 = 93806%: 2100 x 27 = 56700Increase = final - original = 98700 - 9380 = 47320Then % increase = increase / original x 100 = 89320 / 9380 * 100 = 505% (3sf)
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