Residual Income, Persistence factor formula - (solved Qbank#104151?)

Study session 12, chapter 38, Residual income, Persistence factor: [for those with Schweser Qbank. It’s based on question #104151 which I think have wrong answer. I agree on the formula and the numbers, but I don’t get same answer (1,37)]

My problem is to calculate Present Value of continuing Residual Income (PVcRI)

I illustrate it with my own made up problem:

For the next two years we expect ROE of 10%. Our required rate of return is 8%. Current book value is $100 and we pay no divident. After two years we expect RI to decline with a persistence factor of 40%.

B0 = 100 B1 = 110 ROE = 10 ROE = 11 r = 8 r = 8,8 RI = 2 RI = 2,2

PV of year 1 = 1,86 PVcRI = 2,12 = [2,2 / (1+0,08-0,04)] / (1+0,08)^1 Total PV of residual income = 3,98

Would you get same answer?

I use following formula for PV of year 1 = RI1 / (1+r)^1****PVcRI = [(RI2) / (1+r-w)] / (1+r)^1see Schweser p.242

RI = Residual Income r = required rate of return w = persistence factor

I found my error. I divided persistence factor by ten and then did my own calculations.

The correct calculation of my made up example follows:

PV of year 1 = 1,86 PVcRI = 3,00 = [2,2 / (1+0,08- 0,40 )] / (1+0,08)^1 Total PV of residual income = 4,98