9,000.
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100 x 90 = 9,000
Expanded Notation of 90 = (9 x 101) + (0 x 100)
0.3% = 0.3/100 Hence (0.3 / 100) X 90 Cancel down by '10' (0.3./10) x 9 = 2.7/10 = 0.27 The answer!!!!!
100 x 0.9 = 90
First one 90 x 0.6 = 54 100 x 0.5 = 50