Answer:
40%
Explanation:
The ratio is 3 : 2, gold to silver.
He has 3x gold coins and 2x silver coins.
the total number of coins is 5x.
percent = part/whole × 100%
percent of gold coins = (2x)/(5x) × 100%
percent of gold coins = 2/5 × 100%
percent of gold coins = 0.4 × 100%
percent of gold coins = 40%