12=30%, therefore, 4= 10%. Beth must make 40 cupcakes
Beth must make a total of 40 cupcakes, which can be calculated by dividing the 12 cupcakes she made by 30% expressed as a decimal (0.30). This leads to the equation 0.30T = 12, solving for T gives 40. Thus, the total number of cupcakes she needs to make is 40.
;