Answer:
Step-by-step explanation:
Isn’t this mathematics not science
<span>(13a + 5b) + (a + 5b - 3)
</span><span>
= 13a + 5b + a + 5b - 3
= 14a + 10b - 3 </span>

Thats what you would use, so now 2/10 is .2 When you divide so you move the decimal so 20%
The percent increase is 20%
1: 11/28
2: 67/72
3: 1 11/30