Numerical Ability: Find the percent increase or decrease.

1. Old value: 36; new value: 72 2. Old value: 15; new value: 20 3. Old value: 1,000; new value: 3,000 4. Old value: 500; new value: 750 5. Old value: 100; new value: 250 6. Old value: 150; new value: 75 7. Old value: 45; new value: 15 8. Old value: 100; new value: 10 9. Old value: 12; new value: 200 10. Old value 10; new value: 3 part2 https://youtu.be/b01TLlZrRrQ