daniel went to a shop and bought things worth rs. 50, out of which 90 paise went on sales tax on taxable purchases. if the tax rate was 15 %, then what was the cost of the tax free items?
Choices.
A) 19.7 B) 20 C) 43.1 D) 21.5 E) 22
<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">50 - (9/10)</gadget>
<output>491/10 = around 49.1</output>

<gadget id="calculator">90 / 15</gadget>
<output>6</output>

<gadget id="calculator">(491/10) - 6</gadget>
<output>431/10 = around 43.1</output>

<result>C</result>
daniel went to a shop and bought things worth rs. 50, out of which 90 paise went on sales tax on taxable purchases. if the tax rate was 15 %, then what was the cost of the tax free items?
subtract(subtract(50, divide(90, const_100)), divide(90, 15))
total cost of the items he purchased = rs . 50 given that out of this rs . 50 , 90 paise is given as tax = > total tax incurred = 90 paise = rs . 90 / 100 let the cost of the tax free items = x given that tax rate = 15 % ∴ ( 50 − 90 / 100 − x ) 15 / 100 = 90 / 100 ⇒ 15 ( 50 − 0.9 − x ) = 90 ⇒ ( 50 − 0.9 − x ) = 6 ⇒ x = 50 − 0.9 − 6 = 43.1 c