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3 years ago

How did the temperature change if: At first it increased by 25% and then decreased by 40%

Mathematics

2 answers:

Roman55 [17]3 years ago

7 0

Answer:

24.6 % decrease

Step-by-step explanation:

Let x be the original temperature

Increase by 25%

x + .25x

1.25x

Decrease by 40%

The amount decreased is

(1.25x) *.40

.496x

Subtract that from 1.25x

1.25x - .496x

.754x

We need to find the percent decrease

1 - .754 = .246

24.6 % decrease

kirill [66]3 years ago

7 0

Answer:

Temperature decreased by 25%

Step-by-step explanation:

Let initial temperature be t

Step 1

Increase by 25%:

t + 25% = t + 0.25 t = 1.25 t

Step 2

Decrease by 40%:

1.25 t - 40% = 1.25 t - 0.4 * 1.25 t= 1.25 t - 0.5 t = 0.75 t

Temperature changed from t to 0.75 t

The difference in %:

0.75 t - t = -0.25 t = 25% decrease

Temperature decreased by 25%

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Answer:

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