A towel, when bleached, was found to have lost 20% of its…

A towel, when bleached, was found to have lost 20% of its length and 10% of its breadth.The percentage of decrease in area is :

This problem repeats another one in the library (at most with different numbers), so it's left out of browsing.

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #22229