66.6667% decrease.
1 percent = 7800 divded by 100 so 1 percent = 78 5 percent = 5 times 78 5 percent = 390
5% of 78 = 5% * 78 = 0.05 * 78 = 3.9
78/5% = 78/0.05 = 1560 which is an integer.
80 - 5% = 76
60% decrease.
130% of 78 as a fraction is 507/5 or 1012/5
It is: 90-4.5 = 85.5
78%
It is 900 minus 45 equals 855
It is: (45-5)/45 times 100 = 88.89% decrease
1200/100 x 5 is 60. 1200-60 is 1140