Sagot :
bjr
7/8 - (10/7 - 149/168)
= 7/8 - (10x24/7x24 - 149/168)
= 7/8 - (240/168 - 149/168)
= 7/8 - 91/168
= 7/8 - 13x7/24x7
= 7/8 - 13/24
= 21/24 - 13/24
= 8/24
= 1/3
bjr
7/8 - (10/7 - 149/168)
= 7/8 - (10x24/7x24 - 149/168)
= 7/8 - (240/168 - 149/168)
= 7/8 - 91/168
= 7/8 - 13x7/24x7
= 7/8 - 13/24
= 21/24 - 13/24
= 8/24
= 1/3