Viviana has 20 Vanilla chips.
Susana has 25 chocolate chips.
Viviana has 25+5 = <<25+5=30>>30 chocolate chips.
Susana has 3/4*20 = <<3/4*20=15>>15 Vanilla chips.
They have 30+25 = <<30+25=55>>55 chocolate chips together.
Together they have 20+15 = <<20+15=35>>35 vanilla chips.
Together they have 35+55 = <<35+55=90>>90 chips
#### 90