Additionally, cayenne works to improve circulation and helps your body absorb other herbs that you consume. Papaya: Eating sugar is not conducive when trying to fight parasites.
I assume you are asking what 60% of 70 is. If so, multiply 70 x .60 to find. (70 x .60 = 42). 60 is 42% of 70.
rand() % 100 gives you a (almost) random number between 0 and 99*. (rand() % 100) + 50 shifts the range by 50, so it gives you a random number between (0+50) and (99+50), so 50 to 149. To get a range of 50 to 100, you need to make sure that the upper limit after shifting the range is 100, so: (rand() % 51) + 50 gives a range of (0+50) to (50+50), so 50 to 100.