100 text books increased by 99 percent

How to use order of operation in 20 divide by 4 multiply 5 = 1

Luke started a weight-loss program. the first week, he lost x pounds. the second week, he lost pounds less than times the pounds he lost the first week. the third week, he lost 1 pound more than of the pounds he lost the first week. liam started a weight-loss program when luke did. the first week, he lost 1 pound less than times the pounds luke lost the first week. the second week, he lost 4 pounds less than times the pounds luke lost the first week. the third week, he lost pound more than times the pounds luke lost the first week.

Divide. –4.2 ÷ 6 = a –0.7 b 0.7 c –7 d 7 me