Consider that the price of football is 1 and the price of basketball is 1.6. Basketball is more expensive than football, 36 yuan. The price of a football is: 36/( 1.6- 1)=60 yuan.
2 A decimal, if you multiply the decimal part by 2, the original decimal will become 2.6, and if you multiply it by 7, the original decimal will become 6.6. So, the original decimal is
6.6-2.6=4
In other words, the fractional part *(7-2)=4.
The fractional part is 0.8.
2.6-2*0.8= 1
So the original decimal is 1.8.