Jawabanmu

2014-03-13T19:37:37+07:00
90000=600.000 x bunga /100 x 8/12
90000=500 x 8
bunga=90.000 / 4000
         =22,5 %

2014-03-13T19:47:02+07:00
Tabungan setelah 8 bulan = tabungan awal + Bunga
690.000 = 600.000 + a% x  \frac{8}{12} x 600.000
690.000 - 600.000 =  \frac{a}{100}  \frac{8}{12} x 600.000
90.000 =  \frac{4.800.000}{1200} a
90.000 = 4000a
a =  \frac{90.000}{4000}
a = 22,5%
1 1 1