1. The problem statement, all variables and given/known data What's the answer to (0.781±0.002)/(0.551±0.002)? Well, here is the answer (1.417±0.008) that professor Walter Lewin said in one of his videos. I checked this in an online uncertainty calculator and it turned out 1.417±0.006. 2. Relevant equations n/a 3. The attempt at a solution I tried the online calculator. I'm a bit confused and I need an explanation or a great guide or tutorial on these kinds of calculations. Thanks.