None of them.
15/100 = 0.15
30/100 = 0.3
40/100 = 0.4
65/100 = 0.65
80/100 = 0.8
To get 2.5 you would need the fraction 250/100 or 25/10.
None of the fractions equals 2.5. 15/100 is 0.15 or 15% 30/100 is 0.3 or 30% 40/100 is 0.4 or 40% 65/100 is 0.65 or 65% 80/100 is 0.8 or 80% To get 2.5 you either need 25/1000, which is 0.025 or 2.5%, or 250/100 which is 2.5 or 250%.
15/5 and 30/10
It equals 30 15/100 which can be simplified, if you so wish.
3/10 = 30/100
15 is what percent of 30= 15 / 30= 0.5Converting decimal to a percentage: 0.5 * 100 = 50%
15/100 3/20 30/200
15/100 = 30/200 = 60/400
75/100, 15/20, 30/40
15/25 = 30/50 = 45/75 = 60/100
15/30 is equivalent to 1/2
15 over 25 is 15/25. Equivalent fractions are 3/5, 30/50, 45/75, 60/100, etc.
45