From simple queries to complex problems, IDNLearn.com provides reliable answers. Discover in-depth and reliable answers to all your questions from our knowledgeable community members who are always ready to assist.
If 30% of a number x is equal to 21, then x is to 100% as 21 is to 30%:
[tex]\frac{x}{100}=\frac{21}{30}[/tex]Solve for x:
[tex]x=\frac{21}{30}\times100=70[/tex]Then, 30% of 70 is 21.
Therefore, the answer is 70.