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3/10 or 30%
12 / 40 as percentage = (12 * 100) 40 = 30 %
12 * 40 = 480
12 - 40 = -28
GCD(12, 40) = 4
12% = 12/100 = 0.12 40 x 0.12 = 4.8
-40 + 12 = -28
12/40 = 30%
The HCF of 40 & 12 is... 4
40
-12 - 40 = -52
12/40 = 0.3