Here's a hint. It depends on which ton you are referring to as there are more than one conversions available.
1 short ton (used in the US) = 2,000 lb
1 long ton (used in UK) = 2,240 lb
1 metric ton (or tonne, International System of Units) = 1,000 kg (approx. 2,204.6 lb)
To get the answer:
a. Convert lb to ton
b. Multiply by 100%