The Student Room Group
I think you need to go to your local library and take out some GCSE maths books and work through the exercises.

This is the order I would suggest:

Equivalent fractions
Simplifying fractions
Changing a mixed number into an improper fraction
Changing an improper fraction into a mixed number
Finding a fraction of a quantity
Multiplying fractions
Reciprocals
Dividing fractions
Adding and subtracting fractions by finding a common denominator
Adding and subtracting fractions by cross-multiplying
Manipulating algebraic fractions
Solving equations involving algebraic fractions

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