Question about the 25% bonus on readiness.

[Jorgito78]

Page 52 of the manual states that "If the contact results in combat, then the hidden unit (which counts as the attacker) has its readiness increased by 25% for the combat calculation"
My question is:
Does this apply a 25% bonus to readiness or does it add a 25% bonus?

For example, a unit with 50% readiness, would have it's readiness increased to 62,5% (50 + 12,5% (25% of 50)) or increased to 75% (50 + 25%)?