Answer:
$336
Step-by-step explanation:
Given he earned $120 for completing the 15 pieces
That’s
$120 = 15
At the same rate he’ll earn y amount for completing 42 pieces
That’s
$y = 42 pieces
Therefore
120 = 15
y = 42
Cross multiply
y x 15 = 120 x 42
15y = 5040
Divide both sides by 15
15y/15 = 5040/15
y = 336
y = $336
He’d earn $336 for completing 42 pieces at the same rate
