Senku, Taiju and Yuzuriha head to Hakone to collect sulfur for gunpowder, which they’ll need to fight Tsukasa. They accidentally set off an explosion, which attracts some unexpected attention.
If you're off by so much as a few percent, 
the reaction won't happen,
إن أخطأت ولو ببضع درجات
،من المئة، لن يحدث التفاعل
Wenn das Verhältnis nur ein paar
Prozent abweicht, reagiert es nicht.
E, siccome se si sbaglia anche di poco 
la percentuale non fa reazione,
Se errar por alguns
por cento, não vai reagir,
Ошибёшься хоть на пару сотых —
средство не подействует.