Asap I am upset of this

Ok, I have checked your answer and it works so now I have to go back and find my error.

Refer back to the original question.  

I've made a correction post.

This is the original post:

https://web2.0calc.com/questions/asap-please-math#r6

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Below is just what I did to check 120 was correct, then I went back to the original and posted a corrected solution.

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Say Kai did end up with 120 marbles.

He has 3/4 of the total number of marbles left

wich means that Kai ends up with 40

and  there will be 160 marbles left at the end

there are 300 altogether so that means

so a total of 140 must have been given away

Jordan has half as many marbles left as what he gave away so that means he gave away 80.

That means that Jordan started out with 120 marbles

Also they gave away 140 marbles, 80 of them were Jordans so 60 must have been Kai's

Which means Kai started out with 180 marbles.

So far so good. Everything adds up perfectly

Now I need to check that it works with all the info

Kai and Jordan had 300 marbles altogether.    tick

Kai gave away 25% fewer marbles than Jordan.  tick

Jordan was left with 50% as many as the number of marbles he gave away.   tick

Kai had 75% of the total number of marbles the boy left in the end.   tick

How many marbles did Kai have in the end?

The answer is 120 marbles  YES