Question

-3/5*5/7*15/20*-21/20
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Answer 1

Answer:

$\frac{ - 3}{5} \times \frac{5}{7} \times \frac{15}{20} - \frac{21}{20} \\ \\ = \frac{ - 15}{35} \times \frac{15}{20} - \frac{21}{20} \\ \\ = \frac{ - 225}{700} - \frac{21}{20} \\ \\ = \frac{ (- 225 \times 2) - (70 \times 21)}{1400} \\ \\ = \frac{ - 450 - 1470}{1400} \\ \\ = \frac{ - 1920}{1400} \\ \\ = \frac{ - 192}{140} \\ \\ = 1.371$

hope it helps uH ✔