# How do you calculate percent change if the initial number was 17.45 and the mass changed to 17.20?

Percent change is $1.43 \left(2 \mathrm{dp}\right)$
Percent change is $\left(\frac{17.45 - 17.20}{17.45}\right) \cdot 100 = 1.43 \left(2 \mathrm{dp}\right)$[Ans]