Is 'As discussed in section 1, personal saving is the amount of aggregate disposable personal income left over after personal spending on goods and services.' a fitting logical lead-up to 'Personal saving is how much disposable personal income is left over after personal spending and is typically about 5%.'
As discussed in section 1, personal saving is the amount of aggregate disposable personal income left over after personal spending on goods and services.###Personal saving is how much disposable personal income is left over after personal spending and is typically about 5%.