Math question

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Math question

Postby Guest » Sun Oct 07, 2018 9:35 pm

Hi i want to start off by saying i think i am horrible at math but i need help. I am trying to find out the total percentage of nutrients in a certian batch of nutrients.

This is how i think its done buy im not sure if im right.

Nutrients come in npk values. Nitrogen, phosphorus and potassium. 2-1-1 for example 2% nitrogen 1% phosphorus and 1% potassium


Nutrient 1 = 2-1-1
Nutrient 2 = 0-5-2
Nutrient 3 = 1-0-1

Ok so i am trying to figure out the percent of the total parts per million number.

Nutrient 1 raised the ppms up to 500
Nutrient 2 raised the ppms up to 700
Nutriend 3 raised the ppms up to 1000

So i take the total ppm of 1000 and subtract each total ppms raised of each nutrient.

Nutrient 1 raised the total by 500
Nutrient 2 raised the total by 200
And nutrient 3 raised the total by 300

So i then take the total ppm of 1000 and divide it by each of the numbers i just got


Then i take 100 and divide by those numbers


Then i take the original npk value of each nutrient and x's by .50 or .20 or .30?

So nutrient 1 with the npk value of 2-1-1 would be

2 x .50 = 1
1x .50 = .5
1x .50= .5

Nutrient 2 with thw npk value of 0-5-2 would be

0 x .20 = 0
5 x .20 = 1
2x .20 = .4

Nutrient 3 with an npk value of 1-0-1 would be

1 x .30 =.3
0 x .30= 0
1x .30 = .3

So the total of my npk solution would be 1.3-1.5-1.2

Is this right? I kinda stumbled onto this equation and i juat want to know if its correct?

The reason i am doubting myself is because i started to think that if one of my nutrients also has another value instead of the original npk values, like if there was also 20% calcium in the mix as well and i get a total of 100 ppms from that nutrient woud that effect the percents im getting?

I really hope all this makes sense lol.

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