Tricky result

Classic adding with percentages: Evaluate 28% of 450 + 45% of 280

Correct answer:

x =  252

Step-by-step explanation:

r1=28%=10028=257=0.28 r2=45%=10045=209=0.45  a=r1 450=0.28 450=126 b=r2 280=0.45 280=126  x=a+b=126+126=252



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