| 
KEYWORDS | |
| 
Direct and
  inverse proportion | 
Unitary
  method | 
| 
Proportional
  division | 
Percentage
  increase and reduction | 
| 
Compound
  proportion | 
Chain
  percentage | 
| 
Rule of
  three | 
VAT (Value Added
  Tax) | 
Unit6: Proportion and percentage problems

 
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