Question

If 3 pieces of candy cost $2.10,how much would four pieces cost?

Answer 1

210 divided by 3 equals 70 

210+70= 280

$2.80

Answer 2

We need to find the unit rate

2.10/3 = 0.70

0.70*4 = 2.80

Answer: 4 pieces would cost $2.80