Let used balloon be x
[tex]\\ \sf\longmapsto x=60\%\:of\:450[/tex]
[tex]\\ \sf\longmapsto x=\dfrac{60}{100}\times 450[/tex]
[tex]\\ \sf\longmapsto x=45(6)[/tex]
[tex]\\ \sf\longmapsto x=270[/tex]
Step-by-step explanation:
Solution,
Given:-
Now,
Number of used balloons(x)=
Hence, 270 balloons were used.