Jack collected 360 ship models. 40% of them were made by him. If Jack donated 25% of models which he made and donated 50% of models he bought, how many fewer models made by himself were donated than those he bought?

Δabc is dilated by a scale factor of 3 with the origin as the center of dilation to form δa′b′c′. the slope of is -1.2. the length of is p units, the length of is q units, and the length of is r units. the slope of is . the length of is units.