Trust is the common denominator of all cooperation.
Tips
memory
公 (gōng, common/public) + 分母 (fēnmǔ, denominator). The 'public mother' of fractions — what they share underneath.
usage
Like English, can be used figuratively for any shared trait or basis. 最大公分母 (zuìdà gōngfēnmǔ) = greatest common denominator, both literal and metaphorical.
