52.5 % to ppm

52.5 % = 525,000 ppm

%ppm
37.5 %375,000
42.5 %425,000
47.5 %475,000
52.5525,000
57.5 %575,000
62.5 %625,000
67.5 %675,000

52.5 % = 525,000 ppm

Formula

1 ppm = 1 mg/L (aqueous, density ≈ 1 kg/L) · 1 ppb = 0.001 mg/L · 1% = 10,000 ppm