D→P
Decimal to Percent: ×100 (move point 2 right)
P→D
Percent to Decimal: ÷100 (move point 2 left)
F→P
Fraction to Percent: Convert to decimal first, then ×100
P→F
Percent to Fraction: Write over 100, then simplify
This deep dive covers Method: Percentage Conversions within FDP Conversions for GCSE Mathematics. Revise FDP Conversions in Number for GCSE Mathematics with 12 exam-style questions and 22 flashcards. This topic appears less often, but it can still be a useful differentiator on mixed-topic papers. It is section 6 of 15 in this topic. Use this deep dive to connect the idea to the wider topic before moving on to questions and flashcards.
Practice questions for FDP Conversions
Which decimal is equal to 3/4?
Explain why 1/3 cannot be written as an exact decimal, and write 1/3 using correct notation for recurring decimals.
Quick recall flashcards
Halves family
1/2 = 0.5 = 50%
Must know instantly!
FDP Triangle
F (top)
D (left) ← → P (right)
F→D: divide
F→P: ×100
D→P: ×100