"Calculate the square root of 10 (√ 10) to 4 decimal places.<span>Find the perfect square number closer to 10. 32 = 9 and 42 = 16, so take 3.Divide 10 by 3. 10÷3 = 3.33 (you can round off the answer)Average 3.33 and 3. ( 3.33 + 3)÷2 = 3.1667." Source-</span>http://burningmath.blogspot.com/2013/12/finding-square-roots-of-numbers-that.html
Or 4 more understanding: 12% of £40000 </span>1%= 400, therefore, 12%= 4800. In January, the value was £44800. 10% of this is £448. Add £448 to £44800, giving you £45, 248
