将下列分数转换为百分数。
$(a).\ \frac{1}{8}$
$(b).\ \frac{3}{40}$
$(c).\ \frac{3}{40}$
$(d).\ \frac{2}{7}$
已知:$(a).\ \frac{1}{8}$ $(b).\ \frac{3}{40}$ $(c).\ \frac{3}{40}$ $(d).\ \frac{2}{7}$
要求:将下列分数转换为百分数。
解答
$(a).\ \frac{1}{8}$
$=\frac{1}{8}\times100$ %
$=\frac{25}{2}$ %
$=12.5$ %
$(b).\ \frac{5}{4}$
$=\frac{5}{4}\times100$ %
$=5\times25$ %
$=125$ %
$(c).\ \frac{3}{40}=\frac{3}{40}\times100$ %
$=\frac{3}{2}\times5$ %
$=\frac{15}{2}$ %
$=7.5$ %
$(d).\ \frac{2}{7}=\frac{2}{7}\times100$ %
$=\frac{200}{7}$ %
$=28\ \frac{4}{7}$ %
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