How many wins do I need to get from Iron 4 to Master?

With a 55% win rate, you need to play 1200 games, win 660 of them and lose 540.

With a 60% win rate, you need to play 600 games, win 360 of them and lose 240.

With a 65% win rate, you need to play 400 games, win 260 of them and lose 140.

With a 70% win rate, you need to play 300 games, win 210 of them and lose 90.