(1/4) kilogram of flour weighs (2/5) kilogram after being made into bread, what percentage is added? what is the correct answer
(1/4)千克面粉制成面包后重量是(2/5)千克，加重了百分之几？正确的答案是多少
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(2/5) - (1/4)</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">(3/20) / (1/4)</gadget>
<output>3/5 = around 0.6</output>

<result>3/5 = around 0.6</result>