Question

Thirty is 60% of what number

Answer 1

When you see 'is' that means an = sign
When you see 'of' that means a x (multiplication) sign

So

30 is 60% of what number

Let us define this 'what number' as x.

So:

30 is 60% of x

Translating that into an equation based on what I said above, we get:

$\sf{30 = \frac{60}{100}\times x}$

Solve for x:

$\sf{\frac{30\times100}{60}=x$

And simplfying that:

$\sf{x=50}$

So your final answer is $\sf{\boxed{50}}$