If 10% of an amount is nine dollars find 30% of the amount

Answer 1

To find 30% of the amount, we need to determine the value of 30% in terms of the given 10%.

Let x be the amount.

If 10% of the amount is 9 dollars, we can set up the equation:
(x)(10/100) = 9

To find the value of 30% in terms of the given 10%, we can use proportions:
(30/100) = y/9

Cross multiplying, we get:
(30)(9) = (100)(y)
270 = 100y

Dividing both sides by 100, we find that y = 2.7.

Therefore, 30% of the amount is 2.7 dollars.