100 x 53/75 = 70.66... %
-22
53
There is no such isotope (75) known. Iodine (atom number 53, average atomic mass 127) has 53 protons and 70 up till 82 neutrons. The lowest known isotope number therefor is 123.
The answer is 97. 53 + 11= 64 64 + 11= 75 75 + 11= 86 86 + 11= ?
75
11, 23, 53, no. 75, 90, yes.
The average of 100 and 53 is 76.5.
71+4=75 72+3=75 60+15=75 6+69=75 11+64=75 22+53=75
76 is the average of 75 and 77.
54 inches wide, 75 inches long
The average is 80.