We let x = Kim's amount
y = Laura's amount
z = Molly's amount
We have three unknowns and it should be that we have three equations to set up to be able to solve this.
x + y + z = 385 (1)
z - x = 105 (2)
2/5 = x/z (3)
Solving simultaneously, we can get the values as follows:
x = 70
z = 175
y = 140
Therefore, the percentage that Laura got was 36.4% of the whole money. Hope this answers the question.
