Errors in figures

#89 amortises over 20 years with with a 13.25% borrower rate.  After three months - entering the transition between new system and old -  each £100 loan unit has had capital repaid of £0.25862708  so your remaining principal is £99.74137292

#66 after three interest free months, the loan amortises over (the remainder of ) 9 years with a borrower rate of 15%.  After the 5th payment, with two repayments of capital,  - entering the transition between new system and old -  each £100 loan unit has had capital repaid of £0.93679711  so your remaining principal is £99.06320289

In a previous post, Chris mentioned how this would have been rounded for each loan unit and then summed to present a figure to you to indicate your holding going into the transition.  If the remaining principal was rounded up, to £99.75 for loan A and then multiplied by 26 units that's £2593.50 displayed to you as representing your holding.  Under the new system, the display is a more accurate view of your holding, given by the rounding of (26 x £99.74137292) or £2,593.27569605  This is displayed to you as £2953.28

It's important to recognize that the underlying reality - your holding - has not changed between the two systems.  It's just that under the new system, the view you have of your holding is less susceptible to a systematic accumulation of rounding errors - and therefore more accurate.  Nobody has lost any pennies.