9 is 30% of 30, because 9/30 = 0.3 and 0.3 written as a percentage is 30% .
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% rate of 9/30:= 9/30 * 100%= 0.30 * 100%= 30%
10 percent of 90 is 9 so 30 percent will be 9 times 3 which is 27
21. (30 percent of 30.00 = 30 x 0.3 = 9. 30.00 - 9 = 21)
% rate:= (9/30) x 100%= 0.30 x 100%= 30%
9/30 = 3/10 = 0.3 = 30%