Use a calculator to evaluate the left and right side separately.
4/3 = 24/30
1.333 = 0.8
The equation is false.
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Alternatively, you can cross multiply like so
4/3 = 24/30
4*30 = 3*24
120 = 72
Since that equation is false, it means that the original equation 4/3 = 24/30 is false.