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Perumpamaan
2/5=20/50 =0,4
b . persennya 2/5 = (2/5= 2x20/5x20= 40/100 x 100% = 40%) jadi jawabannya 40%
c. permil 2/5 = ( 2x200)/(5x200) = 400/1000= 400 °/oo) jadi jawabannya 400 permil.
semoga membantu.
(lambang 0/00 itu satuan permil)