if 15 % of a is the same as 30 % of b, then a: b is:  Pick one: A) 1 : 4 B) 4 : 3 C) 6 : 7 D) 3 : 5 E) 2 : 1
<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">(3/10) / (3/20)</gadget>
<output>2</output>

<result>E</result>
if 15 % of a is the same as 30 % of b, then a: b is:
divide(divide(30, const_100), divide(15, const_100))
expl : 15 % of a i = 30 % of b = 15 a / 100 = 30 b / 100 = 2 / 1 = 2 : 1 answer : e