If a number called 'N' is greater than 20, you would write N > 20 You can see how the symbol tapers down as it goes from 'N' to 20, because 'N' is bigger and 20 is smaller.
10
It is greater than 20%; 0.5 is equivalent to 50%, which is now made clear to be more than 20%.
100.371 is greater.
23 is the smallest prime number greater than 20.
20 percent greater.