if original is less than new it is increase
if original is more than new then it is decrease
1. 4 to 5
difference is 1
1/4=0.25=25% increase because it got bigger
2. 1.0 ro 1.3
diference is 0.3
0.3/1.0=0.30=30%
increase 30%
3. 15 to 12
difference of 3
3/15=0.20=20%
decrease 20%
4. original 30 to 18
diffrence is 12
12/30=0.40=40%
decrease 40%
5. 60 to 63
difference is 3
3/60=0.05=5%
increase 5%
6. 160 to 136
difference is 24
24/160=0.15=15%
decrease 15%
7. 7.7 to 10.5
difference is 2.8
2.8/7.7=0.36363636=36.36%
answer is 36.36% increase
8. 9.6 to 5.9
differnece is 3.7
3.7/9.6=0.385=38.5%=39%
decrease 39%
