1. 填空
（⑴11.5%[111.5%-100%];
⑵117.3%[100%+17.3%];
⑶2.9%[100%-97.1%]
2. (3.6-3.4)÷3.4≈5.9%
或3.6÷3.4≈105.9%;105.9%-100%=5.9%
3. (2800-2700)÷2800≈3.6%
或2700÷2800≈96.4%;100%-96.4%=3.6%
4. ⑴30÷48=62.5% ⑵100%-62.5%=37.5%
或（48-30）÷48=37.5%
5. ⑴150÷135≈111.1%
⑵（150-135）÷135≈11.1%
或150÷135≈111.1%;111.1%-100%=11.1%
⑶135+15=150(cm) 150÷135≈111.1% |
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