Fa Raymond a tlhatswetsa halofo ya diaparo tse Sarah a di tlhatswang, mme Sarah a tlhatswetsa diaparo tse di fetang tsa ga David ka makgetlho a le mane, bala pharologanyo ya boima jwa diaparo tse di tlhatswitsweng ke Raymond le David fa Sarah a tlhatswetsa dikilogerama di le 181 tsa diaparo.

If Raymond does half as much laundry as Sarah, and Sarah does 4 times as much laundry as David, calculate the difference in the amount of laundry Raymond and David do if Sarah does 400 pounds of laundry.
Fa Sarah a tlhatswetsa dikilogerama di le 181 tsa diaparo, mme Raymond a tlhatswetsa halofo ya tse Sarah a di tlhatswang, Raymond o tlhatswetsa 1/2*181 = 90.5 dikilogerama tsa diaparo.
Sarah o tlhatswetsa gape diaparo tse di fetang tsa ga David ka makgetlho a le mane, go raya gore David o tlhatswetsa 181/4 = <<181/4=45.25>>45.25 dikilogerama tsa diaparo. 
Pharologanyo ya boima jwa diaparo tse di tlhatswitsweng ke Raymond le David ke 90.5-45.25 = <<90.5-45.25=45.25>>45.25 dikilogerama.
#### 45.25 

If Sarah does 400 pounds of laundry, and Raymond does half as much laundry as Sarah, Raymond does 1/2*400 = 200 pounds of laundry.
Sara also does 4 times as much laundry as David, meaning David does 400/4 = <<400/4=100>>100 pounds of laundry.
The difference in the amount of laundry Raymond and David do is 200-100 = <<200-100=100>>100 pounds
#### 100