What is the number if 80% of 50% of it is 0.72? Algebra Linear Equations Percent Equations 1 Answer Euan S. Aug 25, 2017 #x = 1.8# Explanation: So let's call our original number #x#. To take 80% of 50% of #x# what we have done is multiply first by 0.5 and then by 0.8. Hence, #0.72 = 0.8*0.5*x# #implies x = (0.72)/(0.8*0.5)# #therefore x = 1.8# 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 3187 views around the world You can reuse this answer Creative Commons License