80 = 100%
8 = 10%
4 = 5%
Answer: 80 + 4 = 84
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Multiply 80 by 1.05 to increase by 5%.
15% of 80 = 80*15/100 = 12 So, an increase of 15% is 80+12 = 92
4/5
Example: What is 5% of 80 = 4 (80 x 5% = 4)
100*(80 - 50)/50 = 100*30/50 = 60%