9514 1404 393
Answer:
6.984×10^8 km
Step-by-step explanation:
Your calculator can tell you the answer to this.
15.15×10^8 -8.166×10^8 = 6.984×10^8
The difference between the distances is about 6.984×10^8 km.
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Additional comment
If you're paying attention to significant figures, you must round this to 6.98×10^8 km. The precision of the Saturn distance does not allow any better precision in the difference.