The new pad of paper has 120 pages. Sammy uses 25% of the pages for his science project, and another 10 pages for his math homework. How many pages remain in the pad? Let's answer step by step:
He used 0.25 * 120 = 30 on science. There were 120 - 30 = 90 pages left. And then he has 90 - 10 = 80 after math. The answer: 80.