How much weight would i need to lose to be healthier for dance?

Hi! I'm 15 too and feeling the same way! It's harder when you see all these dancers with perfect weights but I think you should keep training in dance and I it comes off it comes off! Dont harm yourself trying to become 'perfect' the best ballerina I know isnt the skinniest but it doesn't matter, it's how you dance not your weight!! Good luck x