At the beginning of May, the electric meter on a house showed 648.19 kilowatt hours. At the end of May, the electric meter on the same house showed 1,128.21 kilowatt hours. How many kilowatt hours of electricity were used during May?

Isabelle is mixing red and blue paint to make purple paint she adds 3/10 of a fluid ounce of red to 12/25 of a fluid ounce of blue to make 1 1/30 fluid ounces of purple how many fluid ounces of red paint ounces of red paint will she need to make 3 fluid ounces of purple paint