ab
a= 10/11
b= 8/11
[tex]ab=\frac{10}{11}\text{ x }\frac{8}{11}[/tex]We have to multiply the top numbers ( numerators) with each other, and then the bottom numbers ( denominators)
[tex]ab=\text{ }\frac{10\times8}{11\times11}[/tex][tex]ab\text{ = }\frac{80}{121}[/tex]