Henry Ernest Dudeney/Puzzles and Curious Problems/152 - The Length of a Lease

Puzzles and Curious Problems by Henry Ernest Dudeney: $152$

The Length of a Lease

A friend's property had a $99$ years' lease.

When I asked him how much of this had expired, the reply was as follows:

Two-thirds of the time past was equal to four-fifths of the time to come,

so I had to work it out for myself.

My bad for asking intrusive personal questions.

Sources

• 1932: Henry Ernest Dudeney: Puzzles and Curious Problems ... (previous) ... (next): Arithmetical and Algebraical Problems: Various Arithmetical and Algebraical Problems: $152$. -- The Length of a Lease
• 1968: Henry Ernest Dudeney: 536 Puzzles & Curious Problems ... (previous) ... (next): Arithmetical and Algebraical Problems: Miscellaneous Puzzles: $224$. The Length of a Lease