一、口算。
$\frac{9}{13}×\frac{2}{3}=$
$\frac{1}{6}+\frac{2}{3}=$
$\frac{3}{4}×0.88=$
$3-\frac{6}{7}=$
$\frac{1}{2}÷\frac{1}{6}=$
$\frac{4}{5}×\frac{5}{12}=$
$\frac{1}{6}×\frac{3}{8}=$
$\frac{17}{9}-\frac{4}{3}=$
$\frac{4}{7}÷4=$
$16÷\frac{4}{3}=$
$\frac{2}{7}÷\frac{1}{7}=$
$\frac{5}{16}×\frac{8}{15}=$
$\frac{3}{5}×\frac{2}{3}=$
$2.4×\frac{5}{6}=$
$30÷\frac{6}{5}=$
$\frac{2}{5}-\frac{3}{8}=$
$\frac{3}{7}÷\frac{1}{5}=$
$\frac{3}{4}+\frac{7}{8}=$
$\frac{2}{9}×\frac{5}{6}=$
$\frac{5}{6}-\frac{2}{3}=$
$\frac{3}{8}÷\frac{5}{4}=$

$\frac{6}{13}$
$\frac{5}{6}$
$\frac{33}{50}$
$2\frac{1}{7}$
3
$\frac{1}{3}$
$\frac{1}{16}$
$\frac{5}{9}$
$\frac{1}{7}$
12
2
$\frac{1}{6}$
$\frac{2}{5}$
2
25
$\frac{1}{40}$
$\frac{15}{7}$
$\frac{13}{8}$
$\frac{5}{27}$
$\frac{1}{6}$
$\frac{3}{10}$

二、把下面的小数和分数改写成百分数。
1.27
$\frac{9}{10}$
0.62
0.005
$\frac{3}{8}$
0.029
2.3
$\frac{7}{5}$
3
$\frac{11}{20}$

127%
90%
62%
0.5%
37.5%
2.9%
230%
140%
300%
55%