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KengaRu [80]
2 years ago
7

How do you use proportions to solve percent problems​

Mathematics
1 answer:
exis [7]2 years ago
7 0

Answer:

Step-by-step explanation:

EXAMPLE #1:

What number is 75% of 4?   (or   Find 75% of 4.)

The PERCENT always goes over 100.

   (It's a part of the whole 100%.)

4 appears with the word of:

   It's the WHOLE and goes on the bottom.

A proportion showing one fraction  with PART as the numerator and 4 as the denominator equal to another fraction with 75 as the numerator and 100 as the denominator.

We're trying to find the missing PART (on the top).

In a proportion the cross-products are equal:   So 4 times 75 is equal to 100 times the PART.

The missing PART equals 4 times 75 divided by 100.

(Multiply the two opposite corners with numbers; then divide by the other number.)

4 times 75 = 100 times the part

300 = 100 times the part

300/100 = 100/100 times the part

3 =   the part

A proportion showing the denominator,  4, times the diagonally opposite 75; divided by  100.

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2/3 x + 1/2 equals 3/4 + 5/3 ​
worty [1.4K]
2/3x + 1/2 = 3/4 + 5/3
2/3x + 1/2 - 1/2 = 3/4 + 5/3 - 1/2
2/3x = 3/4 + 5/3 - 1/2
2/3x = 3/4(3/3) + 5/3(4/4) - 1/2(6/6)
2/3x = 9/12 + 20/12 - 6/12
2/3x = 23/12
2/3x(3/2) = 23/12(3/2)
X = 69/24
X = 2 21/24
X = 2 7/8
3 0
2 years ago
!HURRY! Trey evaluated 12/15 + 1/10 and got an answer of 13/25. Which statement is true about his answer?
Setler [38]
12/15 + 1/10 <span>and got an answer of 13/25

</span><span>12/15 is close to 1, but he got an answer of 13/25 is close to 1/2

13/25 < 12/15

Answer:
</span><span>
His answer is not correct because the sum cannot be less than either addend.</span>
8 0
2 years ago
Help plz i will make u a brainllest 24.Can you use the SSS Postulate or the SAS Postulate to prove abd=dca? 26 28
Alex_Xolod [135]

Answer:  24) C. SSS only

               26) D. DH = HF

<u>Step-by-step explanation:</u>

24.

<u>Statement</u>                    <u>Reason</u>

1. BD = CA                    1. Given

2. AB = CD                  2. Given

3. AD = AD                  3. Reflexive Property

4. ΔABD = ΔDCA        4. SSS Congruency Theorem

<em>We have no information about the angles so cannot use SAS Theorem.</em>

26.  G H F

      E H D

Line up the letters to find the congruent sides:

⇒  GH = EH

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     GF = ED

7 0
3 years ago
Shortbread fingers
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Step-by-step explanation:

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50/20=2.5g

170/20=8.5g

for one shortbread ^^

6*50=300g

2.5*50=125g

8.5*50=425g

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6 0
2 years ago
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