Apply the formula of percent increase,which is :
new value - old value / old value
so, your question is what percent increase is 12 to 18, here 18 is the
new value and 12 is the old value, now apply to the formula:
percent increase= 18-12 / 12 = 0.5
now to get the percent multiply by 100 , 0.5*100 = 50%
So, the percent increase 12 to 18 is 50%.
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12 is what percent of 18= 12 / 18= 0.666667Converting decimal to a percentage:0.666667 * 100 = 66.67%
The increase from 7 to 12 is about 71.428%
The increase from 12 to 19 is: 58.33%
Since the original value of 50 decreases to 18, it has a % decrease and not a percent increase. % decrease = [(50 - 18)/50] x 100% = 64%
Example: increase from 18% to 37% % increase =|original value - new value|/original value * 100% = |18 - 37|/18 * 100% = 19/18 * 100% = 1.0556* 100% = 105.56%