Explain how you know 21/30 is greater than two thirds

For this question you should know that 2/3 is equal to 20/30 so now you can see that 21/30 is greater than 20/30 :)))
i hope this is helpful 
have a nice day 

Ok.. to compare fractions, all you need to do is look at the denominator. Which one is bigger? 3 or 30? think you have the anwser now? :)

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It's like discovering the answer to a puzzle. the purpose in solving an equation is to find the value or values of the variable that makes it a true statement. any value of the variable that makes the equation true is called a solution to the equation.