# NPS Score on a stacked bar issue when equal Promoters, Detractors and Passives

I'm trying to create an NPS card for a product and I'm running into an issue here.

First of all the structure of the card contains an NPS score, number of responders, and a stacked bar to show the distribution of responses. The card will look roughly as shown below:

The problem

When I have equal numbers of Promoters, Detractors and Passives - I can't show them correctly on a stacked bar as they are because they are 33.3%, 33.3% and 33.3% respectively (equalling to 99.9%). This is because as per my knowledge, stacked bars should always sum to 100%. Hence, the work around is to basically round up the last value shown on the stacked bar so that the total sum is 100%.

First Question: Is this the correct way to go about handling 3 equal parts in a stacked bar?

Now moving on from this, the way NPS is calculated is Promoters % - Detractors %. Ideally this is done before any rounding takes place so here the actual NPS is 0 (33.3% - 33.3%). However, the stacked bar gives a different story (there are 34% Promoters and 33% Detractors).

Second Question: How do I solve this discrepancy between what the stacked bar shows and what the NPS score is?

Any guidance or feedback provided would be very helpful.

• The graphic should provide in a quick way to perceive the situation. If the 34% doesn't change that perception it's fine. But at least show the right numbers below it. Detractors and Promoters are static numbers and Passives is calculated from them, so it makes more sense to make Passives 34% and complete the 100% in the graphic. Mar 24, 2022 at 14:05
• Can you elaborate more on "Detractors and Promoters are static numbers and Passives is calculated from them" - Detractors Promoters and Passives are all responses. It's just that the Passives are ignored in the calculation of NPS right? But I was coming to a similar conclusion of making Passives 34% as it is the value that doesn't affect NPS. I can also add the number of responders under all 3 (Detractors, Passives and Promoters) to further clarify maybe? Mar 24, 2022 at 18:53
• By static I mean that the numbers are taken from measurements and not calculated from those numbers. But I think we're talking about the same thing, I'm just not used to NPS terminology. Mar 25, 2022 at 8:23