Bij de veranderingen horen de groeifactoren
\(g_{1} = (100\% + 3{,}4\%) : 100\% = 1{,}034\)
en
\(g_{2} = (100\% - 2{,}1\%) : 100\% = 0{,}979 \text{.}\)

De totale groeifactor is dan
\(g_{\text{totaal}} = g_{1} ⋅ g_{2} = 1{,}034 ⋅ 0{,}979 = 1{,}012...\)

De totale toename is
\((1{,}012... ⋅ 100\%) - 100\% = 1{,}2\% \text{.}\)

Bij de veranderingen horen de groeifactoren
\(g_{1} = (100\% + 3{,}2\%) : 100\% = 1{,}032\)
en
\(g_{2} = (100\% - 3{,}7\%) : 100\% = 0{,}963 \text{.}\)

De totale groeifactor is dan
\(g_{\text{totaal}} = 1{,}032^{5} ⋅ 0{,}963^{2} = 1{,}085...\)

De totale toename is
\((1{,}085... ⋅ 100\%) - 100\% = 8{,}6\% \text{.}\)

Bij de verandering hoort de groeifactor
\(g = (100\% - 1{,}6\%) : 100\% = 0{,}984 \text{.}\)

De totale groeifactor is dan
\(g_{\text{totaal}} = 0{,}984^{4} = 0{,}937...\)

De totale toename is
\((0{,}937... ⋅ 100\%) - 100\% = -6{,}2\% \text{,}\) ofwel een afname van \(6{,}2\% \text{.}\)

\(g = {169 \over 195} ≈ 0{,}867 \text{.}\)

Op 1 januari 2026 is de hoeveelheid \(156 ⋅ 0{,}867 ≈ 135 \text{.}\)

Op 1 januari 2024 is de hoeveelheid \({156 \over 0{,}867} ≈ 180 \text{.}\)

\(g = 1 \text{.}\)

De procentuele toename is
\(1 ⋅ 100\% - 100\% = 0\% \text{.}\)