Answer :

[tex]0.29[/tex]x[tex]2000=580[/tex] 
580 people had pets.

So [tex]2000-580=1420[/tex]

[tex]1420[/tex] people did not have pets, this is your answer.

Hope I helped
2000/100=20 (1% of 2000)

100-29=71% (percentage of households without pets)

20*71=1420

1420 households do not have pets
--
Alternatively, 2000x0.71=1420