How many fewer grackles did Jayden observe than cardinals?

Jayden observed ? fewer grackles than cardinals.

http://static.k12.com/calms_media/media/1538500_1539000/1538842/1/e0205e9e67a1ca11f25ad768bf9fbd02e8e913cd/MS_IMA_09_10_online_checkpoint_02.jpg

Question

How many fewer grackles did Jayden observe than cardinals?
 
Jayden observed ? fewer grackles than cardinals.

http://static.k12.com/calms_media/media/1538500_1539000/1538842/1/e0205e9e67a1ca11f25ad768bf9fbd02e8e913cd/MS_IMA_09_10_online_checkpoint_02.jpg

anonymous · Answer

Please don't tell me the answer but explain it, i will still give you a medal if you try.

anonymous · Answer

6?

anonymous · Answer

@CountryGurl15

anonymous · Answer

Well according to the chart how many cardinals did she see?