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209 - 83 = 126
99 - 83 = 16
83
The difference is 83 minus 56 = 27
73
.083 or 83/100 or 83%
1,820 - 83 = 1,737
15 - 98 = -83
The atomic number of Bi is 83, so it has 83 protons and 126 neutrons.
249 + 83 - 24 = 308
7-216 = -209
161 - 78 = 83