Question 1054703
So if there was no inflation, you would have received a {{{((630-600)/600)*100=5}}}
5% interest rate
With the inflation, the actual rate is {{{5-4=1}}}
1% real interest rate. 
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The real interest rate using the Fisher equation is,
{{{r=(1+i)/(1+I)-1=(1+0.05)/(1+0.04)-1=0.009615}}}
0.96% real interest rate.