Practice problem
What Is Relative Difference?
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Today () is Nelson Mandela Day! Born today in Nelson Mandela was a South African anti-apartheid revolutionary, politician, and philanthropist. He passed away on at the age of

Image source: By Library of the London School of Economics and Political Science CC BY-SA 4.0, via Wikimedia Commons
In Mandela was arrested and sentenced to life in prison. years later he was released.
How many percent longer would his original lifetime sentence have been, compared to his actual time in prison? Round to the nearest percent.