How do you figure out the percent natural abundance of a made up element?

There is a representation of 51 atoms of a fictitious element called westmontium (). The red spheres represent -296, the blue spheres -297, and the green spheres -298. (There are two blue spheres, twelve green spheres, and thirty seven red spheres.) uming that the sample is statistically representative of a naturally occurring sample, calculate the percent natural abundance of -296 isotope. Calculate the percent natural abundance of the Wt-297 isotope. Calculate the percent natural abundance of the Wt-298 isotope. I'm really confused here! Can you please, please help?