Answer: Technically they are equal
Explanation:
unless you break it down to the decimals, they are equal because 1 5/8 is 1.625, which in the tenths is 1.6. Hundredths is 1.63, and thousandths is just 1.625. But in your 1.6, we don't have enough info to know if it could round up to 1.7 or maybe 1.67 or something like that. Hence, they are equal.