Question

решите действие 8/9 - 1/20

Answer 1

$\frac{8}{9} - \frac{1}{20} = \frac{8*20-1*9}{180} = \frac{160-9}{180} = \frac{151}{180}$

Answer 2

$\frac{8}{9} - \frac{1}{20} = \frac{160}{180} - \frac{9}{180}= \frac{151}{180}$