BLOCK HEAD

UNDERSTAND

• There were a total of 95 red blocks in a bag containing 100 Total blocks
• Some red blocks were taken away so that 75% were red blocks
• How many blocks were taken away?

PLAN

• We used draw a picture to help visualize

SOLVE

• 95/100 - X = 75%/100% | 5/100 - X = 25%/100%
• 5/y = 25%/100%
• X = How many taken | Y = How many left | X + Y = 100
• 5/25% | X/75% 5x3 = 15, 5/15 = 25%/75%
• 15 + 5 = Y = 20 | 100 - Y = X or 100 - 20 = 80 = X

CHECK

• 5/15 = 25%/100%
• 20 + 80 = 100
• X = 80
• 80 Blocks taken Total