Converting 21.87% to PPM Equals?

1 ⤊

2006-09-21 06:03:22 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics

21.87%=21.87/100
multiplyimg both Nr and Dr by 10^4
218700/1000000
218700 in PPM

2006-09-21 06:06:21 · answer #1 · answered by raj 7 · 1⤊ 0⤋

21â87% ( Ã· 100%)
= 0â2187 One million-ant of that, divide by 1,000,000.
= 0â000,000,218,7 ppm.

2006-09-21 14:59:56 · answer #2 · answered by Brenmore 5 · 0⤊ 0⤋

Hi. % means per hundred so multiply by the difference between hundred and million. How many hundreds in a million?

2006-09-21 13:08:37 · answer #3 · answered by Cirric 7 · 0⤊ 0⤋

in 100 parts we have 21.87
in million it would be=PPM
=10^6*21.7/100
=21.7*10000
=217000

2006-09-21 13:17:24 · answer #4 · answered by openpsychy 6 · 0⤊ 0⤋