Answer:
1
Step-by-step explanation:
Let's start by prime factorizing (finding the prime factors) of 16 and 21:
We can see that they DO NOT have any common factors, meaning that their greatest common factor is 1.
Answer:
12% decrease
Step-by-step explanation:
You need to answer this question: What percent of 500 is 440? If you get the answer in a percentage, it will be the percent decrease of this situation.
The answer would be 88%. Meaning 440 is 88% of 500.
This would also mean 500-440 is 100%-88%. 60 is 12%.
Since the difference between 500 and 440 is 12% the answer is above.
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3^-2 is the same as 1/3^2
3^2 = 9
1/9
3^-2 = 1/9
Hope this helped, please mark as brainliest if this helped!