17.16 is 62.4% of what number?

17.16 is 62.4% of what number?

'is' indicates an equal sign.

62.4% = 0.624

'of' indicates multiplication

'what number' indicates an unknown value that we can call 'x'

17.16 = 0.624 * x

17.16 = 0.624x

Divide 0.624 to both sides:

x = 27.5