Helpppppp meeeEEEEEeeeEEeeeEEeeeEEEEEEeeEe

Melanie uses 8.8 pints of white paint and blue paint to paint her bedroom walls.
4/5 of this amount is white paint, and the rest is blue paint. How many pints of blue paint did she use to paint her bedroom walls?
it's on zearn, zearn is so stupid

white: 4/5 * 8.8 = 0.8 * 8.8 = 7.04 pints

blue: 8.8 - 7.04 = 1.76 pints

not so hard after all, was it?