Zizhen Primary School donated money to the disaster area. The sixth grade donated 120 yuan, 30 yuan less than the fifth grade, and how much less than the fifth grade?
子珍小学为灾区捐款，六年级捐款120元，比五年级少捐30元，比五年级少百分之几？
<gadget id="calculator">120 + 30</gadget>
<output>150</output>

<gadget id="calculator">30 / 150</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>