Question 964025
Year 7=42%
Year 8=(5/7)(42%)=30%
Year 9=100%-72%=28% 
Year 9=Year 8-20=30%-20uniforms 30%-20 uniforms=28% so 2%=20 uniforms
Total (100%)=20/0.02=1000 uniforms
ANSWER: The total order was 1000 uniforms.