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xenn [34]
2 years ago
14

Nancy put new insulation in her attic and discovered that her heating bill for December decreased from $160 to $100. What is the

percent decrease?
The amount of decrease is ______?
Mathematics
1 answer:
WINSTONCH [101]2 years ago
4 0

Answer:

37.5% decrease

Step-by-step explanation:

To find a relative percentage you generally follow the rule of part divided by whole.

$100 / $160 = .625 (62.5%)

So $100 is 62.5% of $160

To find the decrease we need to subtract 62.5% from 100%

100 - 62.5 = 37.5

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Len [333]

Answer:

$11.65

Step-by-step explanation:

20% of 58.25, "of" in math means multiplication. So you multiply it.

To get 20% as a fraction you move the decimal 2 places to the left, and it's .2 or .20 so you get this equation:

.20 * 58.25

So your answer is, $11.65.

To find the total of the bill including the tip it would just be

11.65 + 58.25 = 69.90

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Is 1/40 equal to 1/10?
Sauron [17]
No because 1/10 is much more then 1/40
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tensa zangetsu [6.8K]

Answer:

1/25

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We can see that in this pattern, the denominator and the numerator of the next fraction cancel out; they're the same.

(1/2) x (2/3) x (3/4) = 1/4 (do you see it?)

The only things that do not cancel out are the numerator of the first fraction and the denominator of the last. So, in the end, the answer will be 1/25.

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