of means multiplication in mathematics
Translating what you were given yields you:
[tex]\sf{\frac{24}{100}\times25=?}[/tex]
And simplifying that gets you:
[tex]\sf{\frac{24}{4}=?}[/tex]
And that gives you your final answer which is:
[tex]\huge{\boxed{\bf{6~members~are~new}}}[/tex]
