Answer:
Josh will save 62.5% of his salary
Explanation:
We know that John spends 37.5% of his total salary, and we want to know how much he can save
To do this we have to subtract from the total salary that we will represent it with 100% what he spends 37.5%
100% - 37.5% = 62.5%
Josh will save 62.5% of his salary