52
Explanation:
I don't really know what the other numbers are for but I'll just answer the first line.
Basically, you have to find what 10% of 130 is and multiply that number by 4.
130/10 = 13 (10% of 130)
4(13) = 52 (40% of 130)
You can verify this by typing in your calculator (130 x 0.40) and you should get 52.
You can also take 100% of 130 and substract by 60% of 130 to find 40%.