A dilation from center O with scale factor r1 = 1/4 maps a point P to another point P’. Then a second dilation from O with scale factor r2 maps to P’ to P. What is the value of r2?

Long division setup showing an incomplete calculation. 12 is in the divisor, 6839 is in the dividend, and 5 hundreds and 6 tens is written in the quotient. 6000 is subtracted from 6839 to give 839. an unknown value represented by a box is being subtracted from 839. what number should be placed in the box to complete the division calculation?