If Leila spent 3/4 of her savings on make-up, this means she spent 1- 3/4 = 1/4 of her savings on a sweater.
Let S be her original savings.
If the sweater cost $20, this means 1/4 * S = $20.
Thus S = $20 * 4 = $<<20*4=80>>80.
#### 80