DUE TOMORROW PLEASE HELP calculate each percent increase or decrease. round to the nearist whole number if necessary.
1. original amount:30 , new amount: 45
2. original amount:12 , new amount: 16
3. original amount: 17 , new amount: 21
4: original amount: 85 , new amount: 56
5. original amount: 48 , new amount: 37
6. original amount:124 , new amount: 76