30% of which number is 12: A) 40 B) 41 C) 42 D) 43 Solution Let number be = X 30% of X = 12 (30/100) * X = 12 X = 40 Related MCQs: Scotograph is an instrument for: Who among the following is the current pope of Vatican City? Which Pakistani among the following was awarded, Oscar: Complete the Chinese proverb. “Heaven is high end the …… is far away”.