rút gọn 375 x 126 trên 369 x 250

`(375 xx 126)/(396 xx250)`

`= ( 3 xx 125 xx 2 xx 9 xx 7)/(4 xx 9 xx 11 xx 2 xx 125)`

`= (125 xx 2 xx 9 xx 3 xx 7)/(125 xx 2 xx 9 xx 11 xx4)`

`= (3 xx7)/(11 xx4)`

`= 21/44`

$\dfrac{375 × 126 }{396 × 250}$

$\text{= $\dfrac{125 × 3 × 2 × 7 × 9 }{4 × 9 × 11 × 2 × 125}$}$

$\text{= $\dfrac{(125 × 9 × 2 ) × 3 × 7 }{4 × 11 × (9 × 2 × 125)}$}$

$\text{= $\dfrac{21}{44}$}$