Question

Tamara has 20000. If 4/5 of what Tamara has equals 8/9 of what Martina has, how much does Martina have

Answer 1

Martina has 18,000

Explanation:

1. Set up the 4/5 the amount Tamara has as a proportion. 4/5 = x/20000
2. Then cross multiply
3. 4 * 20,000 = 80,000
4. 80,000 = 5x
5. Divide and get 16,000 (This is 4/5 of what Tamara has)
6. Set up what Martina has as a proportion. 8/9 = 16,000/x
7. Cross multiply 8x = 16,000 * 9
8. 8x = 144,000
9. Divide by 8
10. 18,000 :)