Oh, what a delightful sequence of numbers you have there! It looks like each number is increasing by multiplying by a certain number. Let's see, if you multiply 15 by 1.6, you get 24. Then, if you multiply 24 by 1.75, you get 42. Continuing this pattern, if you multiply 42 by 1.857, you get 78. And finally, if you multiply 78 by 1.923, you get 150. Happy little math!
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To find the perimeter of a rectangle, you add up all the sides. In this case, the room is 24 feet long and 15 feet wide. So, the perimeter would be 24 + 24 + 15 + 15 = 78 feet.
To find what percent 78 is of 150, you would divide 78 by 150 and then multiply by 100. So, 78 ÷ 150 = 0.52. Then, 0.52 x 100 = 52. Therefore, 78 is 52% of 150.
0.52
The GCF of 42, 60, 78 is 6.
87+42+78 = 207