As the three corresponding digits in 162 are lower than those in 379, you can quickly do it by taking each digit from the corresponding one, to give you 217.
To subtract 15 percent from a number, multiply it by (1 - 15/100) = 0.85. Therefore, 162 - 15% = 162 x 0.85 = 137.7.
Providing that it is a regular polygon then subtract 162 from 180 which is 18 and then divide this into 360 which is 20. So it has 20 sides
7.5% of 379= 7.5% * 379= 0.075 * 379= 28.425
35% of 379= 0.35 x 379 = 132.65
162 162 = 162 162
379 = 37,900%
379
624-379 = 245
1 and 379
450 - 379 = 71
379
379 is a prime number.