Hubby doesn’t want to do 50% of parenting as he says I don’t earn 50% of household income!

So angry with my husband. He says that he earns much more money than me. I earn about 50k a year and he earns around 250k. As such proportionately he should only do at best 20% of parenting duties and I should do the remainder. I work just as long hours as him. But my job doesn’t pay as well. What should I do! #assholehubby #ranting