As a simple example, let's say we're subtracting ¾ from 1. Convert 1 to 4/4. 4/4 - ¾ = ¼. If the whole number is something else, let's say 6, and you're subtracting ¾, convert the 6 to 24/4. 24/4 - ¾ = 21/4, or 5¼.

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