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1. How to calculate percentage of a number?
2. How to find what percent of X is Y?
3. How to find X if P percent of it is Y
4. How to convert a percentage to a decimal?
5. How to convert a decimal to a percentage?


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Sagot :

Luna376idn

Step-by-step explanation:

1. Use the percentage formula: P% * X = Y

Example: What is 10% of 150?

• Convert the problem to an equation using the percentage formula: P% * X = Y

• P is 10%, X is 150, so the equation is 10% * 150 = Y

• Convert 10% to a decimal by removing the percent sign and dividing by 100: 10/100 = 0.10

• Substitute 0.10 for 10% in the equation: 10% * 150 = Y becomes 0.10 * 150 = Y

• Do the math: 0.10 * 150 = 15

• Y = 15

• So 10% of 150 is 15

• Double check your answer with the original question: What is 10% of 150? Multiply 0.10 * 150 = 15

2. Use the percentage formula: Y/X = P%

Example: What percent of 60 is 12?

• Convert the problem to an equation using the percentage formula: Y/X = P%

• X is 60, Y is 12, so the equation is 12/60 = P%

• Do the math: 12/60 = 0.20

• Important! The result will always be in decimal form, not percentage form. You need to multiply the result by 100 to get the percentage.

• Converting 0.20 to a percent: 0.20 * 100 = 20%

• So 20% of 60 is 12.

• Double check your answer with the original question: What percent of 60 is 12? 12/60 = 0.20, and multiplying by 100 to get percentage, 0.20 * 100 = 20%

3. Use the percentage formula Y/P% = X

Example: 25 is 20% of what number?

• Convert the problem to an equation using the percentage formula: Y/P% = X

• Y is 25, P% is 20, so the equation is 25/20% = X

• Convert the percentage to a decimal by dividing by 100.

• Converting 20% to a decimal: 20/100 = 0.20

• Substitute 0.20 for 20% in the equation: 25/0.20 = X

• Do the math: 25/0.20 = X

• X = 125

• So 25 is 20% of 125

• Double check your answer with the original question: 25 is 20% of what number? 25/0.20 = 125

4. Remember how to convert a percentage to a decimal.

• Remove the percentage sign and divide by 100

• 15.6% = 15.6/100 = 0.156

5. Remember how to convert a decimal to a percentage.

• Multiply by 100 and add a percentage sign

• 0.876 = 0.876 * 100 = 87.6%

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Priipointspriiidn

There are nine variations on the three basic problems involving percentages.

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