at first it increased by 25% and then decreased by 45%?

let’s assume it’s 100 degrees.

100+25% is 125

40% of 125 is 50

125-50 is 75

75 is 75% of 100 so 100-75=25%

BOOM

Step-by-step explanation:

let’s assume it’s 100 degrees.

100+25% is 125

40% of 125 is 50

125-50 is 75

75 is 75% of 100 so 100-75=25%

BOOM

It increased by 20.6%

Step-by-step explanation:

Since a temperature was not provided, I chose a random number: 5. I then increased it by 5% & then again by 20%. Then compared the resulting temperature to the original temperature to see how much it had increased by overall.

5×.05=.25

5+.25=5.25

5.25×.20=1.05

5.25+1.05=6.3

5/6.3=.794

The original temperature (5) was 79.4% of the temperature after increase (6.3). Meaning it raised by 20.6%

(100-79.4=20.6)

I'm not sure if this is how your teacher would like you to solve it, but this is how I solved it.

Decreased by 25%

Step-by-step explanation:

Let's take 100 for example.

Step 1: 25% of 100 is 25

Step 2: 100 + 25 = 125

Step 3: 40% of 125 is 50

Step 4: 125 - 50 = 75

Step 5: 75 is N of 100

Step 6: N = 75%

Step 7: 100% - 75% = 25%

Decreased by 25%.

At first it increases by 25%, then you have 1.25x the original temp. A drop of 40% gives you .6 x 1.25, or 75% of the original temperature

Step-by-step explanation:

found that on the web for yuh. I really hope it helped.

9514 1404 393

up 26%

Step-by-step explanation:

The first change multiplied the temperature by 1+5% = 1.05.

The second change multiplied that result by 1+20% = 1.20.

Then the end result was multiplication by ...

1.05 × 1.20 = 1.26 = 1 + 26%

The temperature increased by 26%.

26%

Step-by-step explanation:

There was not a given number, so I chose 100.

It was increased by 5%, so now our number is 105.

It is increased by 20% now.

20% of 105 is 21.

Now I add 21 to 105 and get 126.

126-100= 26,

so it was increased by 26%

26% increase

Step-by-step explanation:

Initial temperature= t

5% increase= t+ 5%= 1.05t

20% increase= 1.05t +20%= 1.05t*1.2= 1.26t

1.26 t= t + 26%

So temperature increased by 26%

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

The temperature changed by 26%

Step-by-step explanation:

5%+t= 1.05t

1.05t +20%= 1.05t

1.05t×1.2= 1.26t

t + 26%= percent change

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