Multiple choice general knowledge math & puzzles Which of these percentage increases is the greatest? From 13 to 81 From 12 to 80 From 1 to 69 All of them are equal Reveal answer Fill a bubble to check yourself C Correct answer Explanation Percentage increase is (New-Old)/Old. From 13 to 81 is ~523%. From 12 to 80 is ~566%. From 1 to 69 is (68/1)*100 = 6800%. Thus, 1 to 69 is the greatest increase.