equal fraction concept
step 1: find the equal fraction
Rachel and Joanne gave away the same number of stickers. Rachel gave away 2/3 of her stickers and Joanne gave away 3/5 of her stickers.
step 2: make numerators the same
2/3 rachel = 3/5 joanne
need find lowest common multiple of 2 and 3 → 6
6/9 rachel = 6/10 joanne
step 3 → convert to units
rachel total → 9u rachel gave away → 6u joanne total → 10u joanne gave away → 6u
total units → 9u + 10u = 19u
total → 323 stickers
19u → 323 stickers 1u → 323 ÷ 19 = 17 6u (rachel gave away) → 6 x 17 = 102