No, it's using 70% of the power that's being used. There's no app in Android that measures the amount of battery power used by an app, just the percentage of the total power used that's used by that app. If your total power drain in 65 minutes is 2% (IOW, the battery went from 100% to 98%), that app used 1.4% of the battery, or 70% of the 2% that was used.