What is the way to understand transformer step up or step down ?

What is the way to understand transformer step up or step down ?
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How to understand the step-up or step-down of a transformer: If the number of patches on the secondary side is more than the primary side of the transformer, then that transformer is a step-up transformer. If the number of patches on the secondary side is less than the primary side of the transformer, then that transformer is a step down transformer.      
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