一、把下面分数化成百分数,除不尽的百分号前保留两位小数。
$\frac{6}{7} \approx$
$\frac{9}{4} =$
$\frac{1}{8} =$
$\frac{3}{5} =$
$\frac{5}{4} =$
$\frac{7}{8} =$
$\frac{1}{6} \approx$
$\frac{5}{2} =$
$\frac{1}{3} \approx$
$\frac{5}{8} =$
$\frac{9}{8} =$
$\frac{7}{20} =$
$\frac{1}{4} =$
$\frac{5}{6} \approx$
$\frac{1}{7} \approx$
$\frac{2}{9} \approx$
$\frac{13}{30} \approx$
$\frac{4}{7} \approx$
$\frac{4}{9} \approx$
$\frac{7}{2} =$
$\frac{1}{5} =$
$\frac{2}{5} =$
$\frac{1}{10} =$
$\frac{3}{16} =$
$\frac{5}{16} =$
$\frac{7}{6} \approx$
$\frac{17}{8} =$
$\frac{11}{10} =$
$\frac{21}{16} =$
$\frac{7}{4} =$
$\frac{27}{8} =$
$\frac{9}{14} \approx$

85.71% 225% 12.5% 60% 125%
87.5% 16.67% 250% 33.33% 62.5%
112.5% 35% 25% 83.33% 14.29%
22.22% 43.33% 57.14% 44.44%
350% 20% 40% 10% 18.75%
31.25% 116.67% 212.5% 110%
131.25% 175% 337.5% 64.29%

二、用小数、百分数表示下面直线上的各点。
1. 百分数 □ □ □ □ □
小数 □ □ □ □

2. 百分数 □ 30% □ □ □
小数 □ □ □ 0.5 □ □

1. 12% 25% 31% 47% 55% 0.11 0.2 0.37 0.55
2. 15% 45% 85% 100% 0.05 0.2 0.75 0.95

三、把表格补充完整。
| 小数 | | | 0.75 | | | 0.2 | | |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 分数 | | $\frac{5}{8}$ | | | $\frac{4}{5}$ | | $\frac{7}{8}$ | |
| 百分数 | 32.5% | | | 125% | | | | 35% |

0.325 $\frac{13}{40}$ 0.625 62.5% $\frac{3}{4}$ 75% 1.25
$\frac{5}{4}$ 0.8 80% $\frac{1}{5}$ 20% 0.875 87.5%
0.35 $\frac{7}{20}$

四、一个数添上百分号，这个数就减少了2.97，这个数原来是（）。

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