Since 7 coins is only 5% of the entire collection, 7 coins=5%. 100% is the total. So first you need to divide 100 by 5 which is 20 (100÷5=20). Next, you need to multiply 20 by 7 (20×7=140) to find out how much coins she has in total.
Set the shorter side of rectangle as X m The longer side = (4X-6) m 58 = (X + 4X -6)2 58=10X -12 70 = 10X X = 7 The shorter side is 7 m And the longer side is 4 x 7 -6 = 22 m
