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Express as a percentage, correct to one decimal place.

Class 7Comparing QuantitiesComparing Quantities
  • A0.8%
  • B83.3%
  • C1.2%
  • D120%

Step-by-Step Solution

Fraction to percentage: multiply by 100. , which is 83.3% to one decimal place. 0.8% is written straight down with a % sign, skipping the ×100. 120% and 1.2% come from turning the fraction upside down and working with .
Answer: B) 83.3%

Key idea: Three forms of the same number

Fractions, decimals, and percentages are three notations for the same idea. Convert freely:

- **Fraction → percentage**: multiply by 100. .
- **Percentage → fraction**: divide by 100 and simplify. .
- **Decimal → percentage**: shift two places right. 0.34 = 34%.
- **Percentage → decimal**: shift two places left. 8% = 0.08.

With practice, this becomes automatic and you can move between forms without thinking.

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