42 is 200% of what number? Algebra Linear Equations Percent Equations 1 Answer CoStellar ยท Stefan V. Apr 18, 2017 42 is 200% of 21 Explanation: I can't really explain this, but I will try my best. 200% can be converted to a ratio of 2:1. Since you have 42, that is your 2 in that ratio. Now that you have your 42, you can divide it by 2 to get your answer, 21. 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 4592 views around the world You can reuse this answer Creative Commons License