A compound is found to contain 23.3% magnesium, 30.7% sulfur and 46.0% oxygen. What is the empirical formula of this compound?

Mass 23.3 30.7 46.0
Mr 24 32 16
Mass/Mr 0.97 0.96 2.875
/Smallest 0.97/0.96= 1 0.96/096= 1 2.875/0.96= 3
Ratio MgSO3 1:1:3