Answer:1.2.20× (1+6.5%) = 21.320× (1+10%) = 223.200× 60% ÷. February 944: 654334 =150c:150 ÷ (1-75%) = 600a+b+c:120+150+6000. [40+40× Then the number of students in a school is "40%" and the number of girls in a school is "30%×40%". The number of girls in school B is "(1-42%) ×1"8. 20000× 0.3%+2940+400 = 3400. Bicycle: color TV: 9. 10. Suppose the cost of each item is X yuan (100-) x = 7511. a: 160×80%×3 = 384 B: 160×3-40×2 = 400 C: 160+ 160×。 Then the distance that Xiao Ming walks is "1+30%" and the time that Xiao Ming walks is "1". Then the time for Xiaojie to leave is "1-20%", and the speed of Xiaojie is Xiaoming's, so the speed ratio between Xiaoming and Xiaojie is1.3:1.25 = 26: 2513. Suppose the purchase cost is X Yuan (1+40%) x×× 70%-x-360 = (40% x-360) × (1-kloc-0/5%) x = 300014. Party A sold it to Party B for the first time at 1000× (1+64). = 1 100 B sold to a1100× (1-10%) = 990a sold to b for the second time, 990× 90% = 89/kloc- The expenditure is "-"-1 000+100-990+891=1,so A earned1yuan 15. Let's arrange X people to process Class A parts. Then arrange (5 1-x) people to process B-type parts16x: 21× (51-x) = 5: 3, x = 35, 51-x =/kloc-.