The difference between C.I

The difference between C.I. and S.I. on an amount of $20,000 for 2 years is $72. What is the rate of interest per annum?

This problem repeats another one in the library (at most with different numbers), so it's left out of browsing.

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #26181