Answer:
y=9%
Explanation:
x=18%
It is in a pattern like x=y+y
18% of x is equal to 9% of y
12% of x is equal to 6% of y ⇌ 12/100x = 6/100y
then (3/2)×(12/100)x =(3/2)×(6/100)y
then (18/100)x = (9/100)y
then 18% of x is equal to 9% of y
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