12. Mrs Liu spent 1/5 of her monthly salary on a handbag, 4/7 of the remainder on a vacuum cleaner and saved the rest of her monthly salary. If she saved $1890, what was her monthly salary?
1 – 1/5 = 4/5
4/7 x 4/5 = 16/35
4/5 – 16/35 = 12/35
12 u -- > 1890
35 u -- > 35/12 x 1890 = $5512.50
Her monthly salary was $5512.50.
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