Relative change of several factors

Question

If we multiply a quantity by two or more coefficients, how do we calculate the percentage or relative proportions of the individual coefficients? Example: x * 1.05 * 0.9high-1 * 0.8high-1 = y How can I calculate the shares for 1.05, 0.9-high-1, 0.8-high-1, which affect the result. It is not about the ratio of the coefficients, but about the effects of the individual factors on the result.