72/80 x 100 = 90 %
100 - 90 = 10 % which is the decrease from 80 to 72
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20/80 x 100 = 25%
90 is 100 percent. 90/100 = 0.9 is 1 percent. 72 / 0.9 = 80 72 is 80 percent of 90.
It is: (300,000-60,000)/300,000 times 100 = 80% decrease
20% 52/65 = 80% 100%-80% =20%
Decrease = 15 - 3 = 12 So %age decrease = 100*12/15 = 80%