I need help with these, saving money with discounts

Answer: i hope this helps! :)
1.) 70
2.) 36.75
3.)126.65
Step-by-step explanation:
1.) .3 * 100 = 30
100 - 30 = 70
2.) .25 * 49 = 12.25
49 - 12.25 = 36.75
3.) .15 * 149 = 22.35
149 - 22.35 = 126.65