Add 5 sets of 15 to 550
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(a) 3/5 = (3*4)/(5*4) = 12/20 (b) 3/5 = (3* 3)/(5*3) = 9/15. (a) 3/5 ... (e) 220/550 = 22/55 {220 and 550 are divided by 10}.
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