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QUESTION
30 is 15% of what number?
##200##
Let ##x## be the number:
Then,
##rarr15/100(x)=30##
##rarr3/20(x)=30##
##rarr(3x)/20=30##
##rarr3x=20*30##
##rarr3x=600##
##rarrx=600/3=200##
