I'm trying to find out what number is 39,200, 2 percent of
Is there a formula

Think about it like this.

Number X times 0.02 = 39,200

Therefore,
X = 39,200 / 0.02
X = 1,960,000

Rex had brought iPod which costs 3,800.00 pesos when He had visited SM mall He had discovered that the same item cost only 2,750.00. What percent had He saved over the original cost.