17/20•10/34:5/2=2,5

Interpret the expression as (17/20) × (10/34) ÷ (5/2).

Compute:

• (17/20) × (10/34) = (1710)/(2034) = 170/680 = 1/4
• Then (1/4) ÷ (5/2) = (1/4) × (2/5) = 2/20 = 1/10

So the result is 1/10 = 0,1 in decimal.

Not equal to 2,5.