He could walk 150% of 50 miles (using Trǔmpomathics).
(I appreciate I'm something or a bore harping on about Trûmp and his failure to understand basic maths and %ages but I can't believe or understand how a (self-)acclaimed businessman can get anywhere without being able to work out basic %ages, beggars belief and either maybe he wasn't the business success he declares or maybe well progressed along age related cognitive decline or probably both?).