$\dfrac{2}{5}$ = $\dfrac{4}{10}$
$\dfrac{7}{4}$ = $\dfrac{175}{100}$
$\dfrac{18}{25}$ = $\dfrac{72}{100}$
$\dfrac{32}{80}$ = $\dfrac{4000}{10000}$
$\dfrac{72}{400}$ = $\dfrac{18}{100}$
$\dfrac{452}{5000}$ = $\dfrac{904}{10000}$
no coppy
xin 5*,cảm ơn và ctlhn cho nhóm :>>