Answer:
18%
Step-by-step explanation:
Iliana's math grade increased from 65 to 86.
So, the percentage increase in the her math grade will be [tex]\frac{(86-65) \times 100}{65} = 32.31[/tex]% (Approximate)
Now, Fiona's math grade increased from 70 to 80.
Hence, the percentage increase in her math grade will be [tex]\frac{(80-70)\times 100}{70} =14.28[/tex]% (Approximate)
So, the difference rounded to the nearest whole number between the approximate percent increases in math grades will be
(32.31 - 14.28) ≈ 18%
So, it is eighteen percent. (Answer)
