Let be "x" the amount of calories the new snack has.
Based on the information given in the exercise, you can set up the following equation:

(Notice that 22% can be written as a decimal number by dividing 22 by 100)
Now, in order to find the value of "x", you need to evaluate:
1. You must solve the multiplication:

2. Finally you must solve the subtraction:

The answer is: It has 156 calories.