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Novay_Z [31]
2 years ago
13

How do I solve ratio and rate problems using equivalent ratios or cross products?

Mathematics
1 answer:
sdas [7]2 years ago
7 0
You have to simplify diagonally them multiply Example:

3
5. 18. 15
__. / ___ =. ___ =
6. 2. 12
1

3/4

Cross simplify
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A person bought some cosmetics from wholesale market at the rate of Rs 360 per dozen he sells it at Rs 80 a pair find the gain p
marusya05 [52]

Answer:

33.33%

Step-by-step explanation:

We need to calculate the <u>unit selling price and cost of each cosmetics.</u>

If a person bought some cosmetics from wholesale market at the rate of Rs 360 per dozen., then for 1 cosmetics, we will say;

x = 1 cosmetic

since 360 = 12 cosmetic

cross multiply

12x = 360

x = 360/12

x = 30

Hence the unit cost price of the cosmetics will be Rs. 30

Similarly, if he sells it at Rs 80 a pair, then he sold one cosmetic at 80/2 = Rs. 40 (a pair is 2 cosmetics)

Selling price per unit = Rs. 40

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percent gain = SP-CP/CP * 100%

percent gain = 40-30/30 * 100

percent gain = 10/30 * 100

percent gain = 100/3

percent gain = 33.33%

Hence the percentage gain is 33.33%

5 0
3 years ago
In January, Angelina made one deposit of $90 to her savings account and made 3 withdrawals of $40 each. What was the total chang
Anna71 [15]
So 90 - (40*3) right ?
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Read 2 more answers
Luke's water bottle holds 2,150 milliliters. He drinks 3.5 bottles of water each day. How many milliliters of water does he drin
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Answer:

7525 milliliters

Step-by-step explanation:

because if you multiply 2150 by 3.5 you will get that number

4 0
2 years ago
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