In a pasture, sheep accounted for 1/8 of the total number of cattle and sheep last year. This year, the number of cattle and sheep increased by 20%, so that sheep accounted for 1/6 of the total number. By what percentage has the number of sheep increased this year compared to last year?
某牧场去年羊占牛羊总的(1/8)，今年牛羊增加了20%，这样羊占总数的(1/6)．与去年相比今年羊的只数增加了百分之几？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(6/5) * (1/6)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">(1/5) - (1/8)</gadget>
<output>3/40 = around 0.075</output>

<result>3/40 = around 0.075</result>