7200*.3 = 2160
10% of 7200 = 720
7 * 3 = 21
add the two zeros...2100
20 * 3 = 60
2100 + 60 = 2160 = 30% of 7200
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6% of 7200= 6% * 7200= 0.06 * 7200= 432
40% of 7200 = 2280
24,000 X 30/100 Cancel down by '100' 240 X 30/1 = 240 X 30 = 7200 The answer!!!!
7200
8.5% of 7,200 is 612.