To get the answer we can use proportion. We know that 4$ its 100% and 4.32 its 100% + taxes. 4$ ---------- 100% 4.32 -------- x crossmultiply now 4x=4.32*100% 4x=432% /:4 x=108% We know that 4.32 its 100% + taxes=108% so to get taxes we have to subtract 108-100. 108%-100%=8% - its the answer.
