How to ask for 100% hike for same work in other company

With your mouth

Ask? Don't. Prove your worth, let them beg. If they don't, their loss. Remember, you're the asset, not them.

You've to sell your skills. Tell them you want 100% coz you bring this and that to the table which a lot of people do not offer. The more you differentiate your abilities + skills, the better it is for you and it's also easier for the company to choose you. Remember, hard skills matter but soft skills matter too.

Check market rates if they’re higher. If you have that data then at least you can say you were underpaid. Otherwise HRs will only low ball you. I was offered lower salary multiple times than I’m making. Along with your skill set if you have this data, then it’ll help. Second is play the game. Get 4 offers with 25% hike each time. Take the 4th offer. I’ve seen some people do this and get big hikes.