hcf(520, 430) = 10
520 = 23 x 5 x 13
430 = 2 x 5 x 43
hcf = 2 x 5 = 10
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17% of 520= 17% * 520= 0.17 * 520= 88.4
70% of 520= 70% * 520= 0.7 * 520= 364
30% of 520 = 156= 30%/100% * 520= 3/10 * 520= 0.3 * 520= 156
25% of 520= 25% * 520= 0.25 * 520= 130
520