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(263) A person’s journey is to go to the office and then go back following the same route. If this person goes to the office and completes 10% of the way back, what percent of the journey has the person walked? (55%)

60？[em11][em11][em11]

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tongxun

另一种相对白痴的算法：
来、回，合起来就是2；
来了，就是完成了1，回了10%，就是0.1，则总共走了1.1
1.1/2 =55%

猫猫头

completes 10% of the way back means 10% of the single route
so it should be 10%*50%=5%
50%+5%=55%