百分率問題

パーセントの計算、パーセント変化、ある数のパーセントを求める問題。

ある数のパーセント、パーセント変化、逆算パーセントの問題をカバーし、すぐに確認できるパーセント電卓も提供しています。

実際の百分率の例題を、ステップごとに解いてみましょう。

採点付きのアダプティブな百分率練習。

素早い百分率の計算。

百分率の例題

以下の例題は現在、英語のみで提供されています。

1. A value changes from 146 to 197. What is the percent change?+

答え: 34.93%

Step 1: Find the difference: 197 - 146 = 51. Step 2: Divide by the original value: 51 / 146 = 0.3493. Step 3: Convert to a percentage: 34.93%.

2. A value changes from 40 to 15. What is the percent change?+

答え: -62.5%

Step 1: Find the difference: 15 - 40 = -25. Step 2: Divide by the original value: -25 / 40 = -0.625. Step 3: Convert to a percentage: -62.5%.

3. What is 75% of 40?+

答え: 30

Step 1: Convert the percentage to a decimal: 75% = 0.75. Step 2: Multiply by 40: 0.75 × 40 = 30.

4. 62% of a number is 248. What is the number?+

答え: 400

Step 1: Write the relationship as an equation: 62% × n = 248. Step 2: Divide both sides by 0.62: n = 248 / 0.62. Step 3: n = 400.

5. 12% of a number is 9. What is the number?+

答え: 75

Step 1: Write the relationship as an equation: 12% × n = 9. Step 2: Divide both sides by 0.12: n = 9 / 0.12. Step 3: n = 75.

6. A value changes from 153 to 135. What is the percent change?+

答え: -11.76%

Step 1: Find the difference: 135 - 153 = -18. Step 2: Divide by the original value: -18 / 153 = -0.1176. Step 3: Convert to a percentage: -11.76%.