1.5% of 4,000$ is 60$ . 60$ times 3 years = 180$
The answer is 70.
5 + 2 = 7
7 x 10 = 70
If it's like the in and out things, I think i can help. So a number goes in and and comes out. What is the rule? What happened from the in to the out?
The new image often has a ' next to it if this helps