Answer:
Mindy uses more white beads
Step-by-step explanation:
For Mindy:
red : white = 4 : 5 = 12 : 15
For Daisy:
red : white = 6 : 7 = 12 : 14
When both use 12 red beads, Mindy uses 15 white beads and Daisy uses 14 white beads.
Mindy uses more white beads when both use 12 red beads.