How much does expense ratio matter in an S&P 500 index (mutual) fund?

I have three retirement accounts with Schwab, Fidelity and T. Rowe Price and hold each of their S&P 500 index funds. The ER for Schwab is 0.02%, Fidelity is 0.015%, and the stodgy old dinosaur T. Rowe Price is a whopping 0.2%. Look at the difference in % gained over a 5-year period between the three funds. Does the 0.2% expense ratio with T. Rowe really eat away 3% over 5 years or this due to some other indexing or trading reason? I'm always amazed at you folks' knowledge about this stuff. Thanks in advance. Well, Reddit won't let me add a photo but the % gain over the last 5 years is 70.87% for Schwab, 70.38% for Fidelity and only 67.17% for T. Rowe.