Can someone help me plz I’m failing math rn

Restrictions on f(x) = 1/x+5 and g(x) = x-2

Four individuals pool money together to start a new business and agree to split the profits equally. n invests $6,000, x invests $2,000, y invests $8,000 and z invests $4,000. if the profits for the first month were $100,000, y receives than if the profits were divided in proportion to how much they invested.

Percent increase and decrease. original number: 45 new number: 18