Please help I Don't understand

Answer:
[tex]0.6[/tex]
Step-by-step explanation:
[tex]~~~~~~\sin \theta = \dfrac{\text{Perpendicular}}{\text{Hypotenuse}}\\\\\\\implies \sin x = \dfrac{15}{25}\\\\\\\implies \sin x = \dfrac{3}{5}\\\\\\\implies \sin x = 0.6[/tex]