Time to bust out the GM translator:

[Jainus]
• Forging : 50% increased success rate = 50% increase on the base rate (literally fractions of a %)
• Refinement : 50% increased success rate = 50% increase on the base rate (literally fractions of a %)
• Reinforcement (Crafted item) : 50% increased success rate = 50% increase on the base rate (literally fractions of a %)
• Enhancement (Forged item) : 50% increased success rate = 50% increase on the base rate (literally fractions of a %)
[ISEN]
• Forging : 50% increased success rate = 50% increase on the base rate (literally fractions of a %)
• Refinement : 50% increased success rate = 50% increase on the base rate (literally fractions of a %)
• Reinforcement (Crafted item) : 50% increased success rate = 50% increase on the base rate (literally fractions of a %)
• Enhancement (Forged item) : 50% increased success rate = 50% increase on the base rate (literally fractions of a %)


TLDR

Use forge buffs and farm those tickets!