What is the next number in the following sequence 30, 24, 19, 15, ..., ?

What is the next number in the following sequence 30, 24, 19, 15, ..., ?

مندرجہ ذیل ترتیب 30، 24، 19، 15، ...، میں اگلا نمبر کیا ہے؟
Explanation

The term in the given sequence follows the particular rule

30, 30-6=24,24-5=19,19-4=15,15-3=12