Answer:
[tex] \boxed{ \bold{ \boxed{ \sf{15 \: cookies}}}}[/tex]
Step-by-step explanation:
Total cookies = 150
percentage of cookies that she ate = 10 %
To find : Number of cookies that she ate
[tex] \sf{10\% \: of \: 150}[/tex]
To convert percent into fraction, divide it by 100 and remove the % symbol.
⇒[tex] \sf{ \frac{10}{100} \times 150}[/tex]
⇒[tex] \sf{15 \: cookies}[/tex]
Thus, She ate 15 cookies.
Hope I helped!
Best regards!!