In 5 years one California Palm tree grew = 85 inches. Then in 1 year the California palm tree grew = (85/5) inches = 17 inches Again A queen palm tree in 8 years grew = 96 inches In 1 year the queen palm tree grew = (96/8) inches = 12 inches. So the California palm tree is growing at a faster rate than the queen palm tree. This is the easiest way of solving this kind of problems. Hope that i have explained the problem enough for you to understand and attempt such problems in the future without anyone's help. <span />