David S. answered • 12/31/19

Patient Tutor with years of Technical Instruction Experience.

1) 3/4 S = $80.25

2) Divide both sides by 3/4

Note: Here's the Rule for Division

Change the “÷” (division sign) to “x” (multiplication sign) and invert the number to the right of the sign.

Multiply the numerators.

Multiply the denominators.

3)4/3 * 3/4 S = $80.25/1 * 4/3

4) 12/12 S = $321/3

5) 1 S = 107

6) S = $107.00

To find 2/5 of S

7) 2/5 * $107.00 = $42.80