Callie H. answered 04/24/19
National Board Certified Teacher can help you/your child in all areas
The usual amount of time is 100%. 50% is half of the amount of time. So 150% is the usual time plus half the usual time. So if it normally takes an hour, they should plan on it taking an hour and a half. If the usual amount of time is ten minutes, they should plan on it taking 15 minutes.