Explanation:
1. Increase amount = 40-25=15 Increase percent = (15/25)×100%= 60%.
2.Increase amount = 30-15 = 15. Increase percent = ( 15/15)× 100% = 100%.
3. Increase amount= 50-18=32 Increase percent= (32/18) x100% = 177.77%
4. Increase amount= 80-22=58 Increase percent= (58/80) x 100% = 72.5% -----> 73% (when rounded of to the nearest 10's).
5. Increase amount= 18-16=2 Increase percent = (2/18)×100 %= 11.111...% -----> 11% (when rounded of to the nearest 10's).
6. Increase amount = 10-3=7 Increase percent= (7/10)×100% = 70%.
7. Increase amount = 100-85 = 15 Increase percent = ( 15/100) × 100% = 15%