The article shows: fn(n miles to km) ≅ next_fib(n) fn(n km to miles) ≅ prev_fib(n) --- Similarly, fn(n kg to lbs) ≅ prev_fib(n) + next_fib(n) fn(n lbs to

The article shows: fn(n miles to km) ≅ next_fib(n) fn(n km to miles) ≅ prev_fib(n) --- Similarly, fn(n kg to lbs) ≅ prev_fib(n) + next_fib(n) fn(n lbs to kg) ≅ (prev_fib(n) - prev_fib(prev_fib(n))) * 2 fn(fib(i) lbs to kg) ≅ fib(i-1) - fib(i-4) # Alternate formula