If y=ws^3/d^4

Question

find the percent increase in y when w increase by 2% s decrease by 3% and s decrease by 1%
plz show the full solution the question is byond my power

Answer 1

Assuming a typo so that the 3 %ages are in the order w,s,d:

(1.02w)(0.97s)^3/(0.99d)^4
= (1.02*.97^3)/.99^4 ws^3d^4
= 0.9691 y

So, y decreased by 3.09%