Tuesday

October 21, 2014

October 21, 2014

Posted by **Bob J** on Wednesday, January 2, 2013 at 10:04pm.

- A positive number is increased by 20%. This new number is now decreased by 20%. To obtain this final result the original positive number could be___.

a) left alone b) increased by 4% c) increased by 2% d) decreased by 4%

e) decreased by 2%

- algebra -
**Henry**, Friday, January 4, 2013 at 1:25pmDan to Carol:

C + 0.25C = $180.

1.25C = 180

C = $144. = Dan's cost.

Alan to Dan:

C + 0.2C = $144.

1.2C = 144

C = $120. = Alan's cost.

(N+0.2N)-0.2(N+0.2N) =

N+0.2N-0.2N-0.04N = 0.96N.

0.96N/N = 0.96 = 96%.

96% - 100% = -4% = 4% Decrease.

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