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Multiplicative inverse of number is the number which if multiplied by original number result in 1. 1/16 ÷ 1/81 + -1/8. 1/16 ÷ 1/81 = 81/16 + - 1/8 = - 1/8. 81/16 - 1/8 = 81/16 - 2/16 = (81 - 2)/16 = 79/16. Multiplicative inverse = 16/79. Go beyond. The Brainly community is constantly buzzing with the excitement of endless collaboration ...