A fraction shows part of a whole. Decimals and percentages are other ways to show the same part.
Half can be written three ways: $\tfrac{1}{2} = 0.5 = 50\%$. And $\tfrac{1}{4} = 0.25 = 25\%$.
Remember
- Percent means "out of 100": 25% = 25 out of 100.
- $\tfrac12=0.5=50\%$, $\tfrac14=0.25=25\%$, $\tfrac34=0.75=75\%$.