Type 1 ppm/ppb/pph Problems:
In this type of problem, you have a set amount of particles in a set about of particles and need to convert the numbers to a percentage. Follow these steps:

  1. Write the number given to you down in the numerator as "parts"
  2. Write the per number in the denominator down in the denominator. Ex) If you are dealing with ppm write million, ppb, write billion, etc.
  3. Divide and get a decimal solution.
  4. Multiply the decimal by 100 to get a percentage.

Stacks Image 17115
Stacks Image 17040
Express 569 ppm as a %.
Stacks Image 17022
Stacks Image 17032
Express 792 ppb as a %.
Stacks Image 17024
Stacks Image 17048
Express 799,564 ppb as a %.
Stacks Image 17099
Stacks Image 17210
Type 2 ppm/ppb/pph Problems:
In this type of problem, you have a percent and want to convert it to a ppm, ppb, or pph. Follow these steps and use cross multiplication:

  1. Write the percentage number down over 100. A percentage means out of 100.
  2. Equal the percentage over 100 to x over a million (ppm) billion, (ppb), or hundred (mph).
  3. Cross multiply and solve for x.

Stacks Image 17234
Stacks Image 17226
Express 75% as ppm.
Stacks Image 17250
Stacks Image 17266
Express 34% as ppb.
Stacks Image 17274
Stacks Image 17258