niks18 HatakekakashiWhere am I faltering in approximation here?

Let x be the sales tax rate.

$12*x/100= 0.66

Solving x=66/12 . . . . . (1)

which is slightly more than 66/11 which in simplified form is 6 . . . ..(2)

Since on comparing (1) with (2)

(1) is having higher denominator my fraction will be slightly smaller than (2)

So x could be closer to 5.8 or 5.9

Now closest value when multiplied with $20 which is closest to , but smaller than 6

gives final value as something just very close but smaller than 1.2, which is (D)

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