The percentage change in Earth’s mass per year is extremely small, ranging from approximately (6.67 \times 10^{-16}% ) to (1.67 \times 10^{-15}% ). I got this from AI obviously. It made no sense so I kept asking questions until it gave me an answer i could get my head around.

Which turned out to be:

Between 1% and 2.5% of the mass of the Palace of Parliament in Bucharest, Romania. 😁