Answer:
36.45
Explanation:
You make 45 into a percentage, which is 0.45%. Then, multiply 0.45 by 81 and you get 36.45. Hope this helps! And if you’re incorrect I deeply apologize. I tried my best and I’m 95% sure that I’m correct.
Let s be the number of smartphones.
81 = .45s, so s = 180
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