0.04 x 12.25 = 0.49
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3% of 1225 = 3% * 1225 = 0.03 * 1225 = 36.75
100% = 1225 1% = 1225/100 = 12.25 5% = 12.25 x 5 = 61.25
306.25
Ten percent of this number is 2450, and half of that is 1225, and so adding these two numbers will give you fifteen percent, which in this case is 3675.
For a square area = side2; perimeter = 4 x side. side2 = 1225 sq cm => side = sqrt(1225) = 35cm => perimeter = 4 x 35cm = 140cm.