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harina [27]
4 years ago
11

Mr. Jones replace 40% of the lights on a Christmas tree. If he replaced 30 lights, how many lights are on the tree total?

Mathematics
2 answers:
cupoosta [38]4 years ago
6 0
This is how I looked at it. If there are 30 lights in 40% then there are 15 lights per 20%.
15 x 5= 75
oksian1 [2.3K]4 years ago
4 0
Since 30 lights are 40% of them:

30*2= 60

Since 2*40= 80

We still need the 20 percent.

Half of 40= 20.

30/2= 15

So, 15+60= 75

75 is the number of lights on the tree.

I hope this helps!
~cupcake
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saul85 [17]

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It is given that,

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