Answer :
Sure! Let's break down each question step by step:
1. **Seven tenths of what number is 490?**
- To find the whole number, you can set up an equation: 7/10 * x = 490.
- Then, you solve for x: x = 490 / 7/10 = 700.
- So, 7/10 of 700 is 490.
2. **What fraction of 3½ is 24?**
- To determine the fraction, set up the equation: x * 3½ = 24.
- Divide 24 by 3½ to find x: x = 24 / 3½ = 6⅘.
- Therefore, 6⅘ of 3½ is 24.
3. **What decimal part of 720 is 420?**
- Create an equation to find the decimal part: x * 720 = 420.
- Divide 420 by 720 to get x: x = 420 / 720 = 0.5833...
- Hence, 0.5833... of 720 is equal to 420.
These calculations help you understand how to find the unknown quantities in each question. Remember, practice makes perfect, so keep solving similar problems to enhance your skills in these types of mathematical operations!
