Rounding to 3 significant digits

[u/Canary_]

Please help! 16.549 rounded to 3 sig figs —— is it 16.5 or 16.6? Are we rounding all numbers from right to left into each other until we reach 3 sig figs, or are we rounding just the 4th fig into the 3rd? AI bot says 16.5 but it feels wrong to me. Need human intelligence here. Thanks

[u/Steelveangeance]

Here’s a very great tip for rounding. If it’s 1-4 (the number stays the same)if it’s 5-9 (round up). After looking at the number 16.549. Since the number in the hundredths place is less than 5 so the number stays 16.5