Explanation:

\(\displaystyle{\frac{{{19}}}{{{50}}}}={\frac{{{19}}}{{{50}}}}\cdot{\frac{{{2}}}{{{2}}}}={\frac{{{38}}}{{{100}}}}={0.38}\)

\(\displaystyle{\frac{{{19}}}{{{50}}}}={\frac{{{19}}}{{{50}}}}\cdot{\frac{{{2}}}{{{2}}}}={\frac{{{38}}}{{{100}}}}={0.38}\)