Oh, dude, let me break it down for you. So, if 3 over 7 equals 21 over what, we just need to do a little math dance. All you gotta do is cross multiply like it's high school algebra all over again. So, 3 times what equals 21? Well, that's just 7, my friend. Easy peasy lemon squeezy!
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The answer is 21 because if 21 is divided by 3 it equals 7 plus 4 equals 11.
20/21
To find out how many groups of 7 equals 21, you can divide 21 by 7. The result is 3, which means there are 3 groups of 7 in 21. This is because when you multiply 7 by 3, you get 21. So, there are 3 groups of 7 that equal 21.
7
21/7 = 3