The percent change in the CPI is equal to the sum of the percent change in its components, each weighted by its share in the base-period budget. For example, housing represented 42.6 percent of the budget. If housing costs go up 10 percent, what will this contribute to the inflation rate, as measured by the CPI? Medical care constitutes only 4.8 percent of the budget. If medical costs go up 10 percent, what is its contribution to the inflation rate?