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PORCENTAGEM, 15% (15100) - Coggle Diagram

- - - - 15x = 300
        x = 300/15
        x = 20
- - - - 230 × (1 + 0,12)
        
        230 × 1,12 = 257,6
  - - - 840 × (1 - 0,04)
        
        840 × 0,96 = 806,4
- - - - X × 1,3 × 1,1
        
        X × 1,43