Les prix ont augmenté d'un bond.

English Translation

Prices rose by a whopping.

“by a whopping”?
This is not coherent English.
“whopping” is an adjective. Therefore, “by a whopping” must be followed by a noun (a quantity), eg. “by a whopping fifty percent” or “by a whopping hundred dollars”.
“by a whopping” alone is nonsensical.

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