Does the calculator support keyboard input?

Yes. Use digits, + - * /, Enter for equals, and Backspace to delete.

How does the percent key work?

Percent applies to the current number. Example: 50 × 10 % = 5.

Simple four-function calculator with percent, memory and history — big buttons, mobile-friendly.

Memory

% applies to the current number (e.g., 50 × 10 % = 5). Keyboard: digits, + − × ÷, Enter (=), Backspace (⌫).