Question

In a recent poll of 2000 households 29% had pets how many house holds did not have pets

Answer 1

2000/100=20 (1% of 2000)

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

20*71=1420

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

Answer 2

$0.29$x$2000=580$ 
580 people had pets.

So $2000-580=1420$

$1420$ people did not have pets, this is your answer.

Hope I helped