Ex.: 2, 2.33, 1/2, 2 1/2, etc. Note that 2 1/2 means two plus a half = 2 + 1/2 
Short Answer: 
Click here to calculate the opposite of 1 5/8. 
StepbyStep Solution: 
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A multiplicative inverse or reciprocal for a number n, denoted by 1n or n^{−1} (n to the power of minus one), is a number which when multiplied by n, their product is 1. In other words, the reciprocal of any number is one divided by that number. The reciprocal of a fraction xy is yx. To find the multiplicative inverse of a real number, just divide 1 by that number. Examples:
This excellent video explains how to find the reciprocal of a whole number, a fraction, as well as, the reciprocal of a mixed number.
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