12 is 40% of what number? Algebra Linear Equations Percent Equations 1 Answer S.S Nov 30, 2016 #x = 30# Explanation: #0.4x = 12# #x = 12/0.4# #x = 30# Answer link Related questions Jimmy made a #"75%# on a test worth #46# points. How many points did he get correct? How do you use proportions to solve percent equations? How do you translate percent problems into an equation? What number is 32% of 600? What number is #3/4#% of 16? 8 is 20% of what number? 99 is 180% of what number? What percent of 7.2 is 45? What percent of 150 is 5? What is 2% of 92? See all questions in Percent Equations Impact of this question 37640 views around the world You can reuse this answer Creative Commons License