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I know from working with this before and my few but awful attempts to solve this and look up a way how to do it but since we are using 3 significant figures would I use 0.01 as my uncertain value divide it by 1.56 and multiply it by 100. I tried this and I was wrong and i can't seem to find out why if you could tell me how to go about this question and what number I would use as my uncertain value and why that would be great :)

Thanks