Going from, say 34%, to 1.34 is called 'converting to multiplier format'. A quick illustration why you need multiplier format:
The average of +50% and -50% is 0%.
Now with real money! start with $1000, +50% makes $1500, then -50% makes $750. Oops!
Multiplier format gives 1.5 * .5 = .75, or 75%. Looks about right!
Regards,
Karel