Fractions, decimals and percentages · Grade 4
In Grade 4 you learn: fractions as decimals.
Fractions, decimals and percentages are three ways of writing the same amount: 1/4 = 0.25 = 25%. Switching between them lets you pick the easiest form for a calculation and compare amounts written in different ways.
Key facts
- Percentage → decimal: ÷ 100 (35% = 0.35). Decimal → percentage: × 100.
- Fraction → decimal: divide the top by the bottom, or make the bottom 10, 100 or 1,000.
- More than one whole is more than 100%: 1.35 = 135%.
Worked examples
Example 1
In a class, 1/4 of the students walk to school, 0.35 cycle and 30% come by bus. The rest come by car. What percentage come by car?
Answer: 10%