\[-90\times \frac{2}{3}\]

1
Use this rule: a×bc=abca \times \frac{b}{c}=\frac{ab}{c}.
90×23-\frac{90\times 2}{3}

2
Simplify  90×290\times 2  to  180180.
1803-\frac{180}{3}

3
Simplify  1803\frac{180}{3}  to  6060.
60-60

Done

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