There are 160 students in the sixth grade of Xinmin Primary School, 70 of whom have reached the national physical exercise standard. If the sixth grade compliance rate reaches 85%, how many students should still meet the standard?
新民小学六年级有学生160人，其中70人已经达到国家体育锻炼标准，要使六年级达标率达到85%，还应有多少人达标？
<gadget id="calculator">85 / 100</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">160 * (17/20)</gadget>
<output>136</output>

<gadget id="calculator">136 - 70</gadget>
<output>66</output>

<result>66</result>