90•7:63

To solve the expression \( 90 \cdot \frac{7}{63} \):

1. Simplify \( \frac{7}{63} \): \[ \frac{7}{63} = \frac{1}{9} \] (since \( 63 = 7 \cdot 9 \)).

2. Substitute back into the expression: \[ 90 \cdot \frac{1}{9} = 90 \div 9 = 10 \]

So, \( 90 \cdot \frac{7}{63} = 10 \).