2½ × 5⅓ 3¾ × 4⅕

2½ × 5⅓= ⁵/₂ × ¹⁶/₃ =13⅓ 3¾ × 4⅕= ¹⁵/₄ × ²¹/₅=15³/₄

5/2 ×16/3 = 80/6 = 13 2/6 b) 15/4 × 21/5 = 315/20 = 63/4 = 15 3/4

5/2*16/3=80/48=40/24=20/12=5/4=1¼ 3¾ × 4⅕= 15/4*21/5=315/20=15¾